Did any of those intense urges like avoiding tasks by sorting and rocking or your urges to hit people sort of dissipate as you got older or do you think training was more responsible? And did any of the really antisocial stuff go away as you learned to communicate? When did you learn to write? I would love to know your answers and those of anyone who gets this post...
It wasn't so much like I had an urge to avoid the tasks, as I might have an urge to avoid clutter, and the hitting thing (both self and others) was more a response to stress and frustration - whether because someone was being mean to me and not understanding, or because it was chaotic environment and I couldn't do anything about it, or if I was trying to punish myself for the "bad" behavior. I still self-injure, but with far less frequency than I used to (it used to be many times per day; now it's maybe once every day or so).
Mostly why I wouldn't participate in the activities was because I didn't understand the spoken instructions, and it was chaotic with noise and movement. I also have and have had difficulty in initiating speech to seek help, to let someone know I don't understand (in fourth grade it would take an hour or two to figure out how to get the teacher's attention and ask for a pencil so I could write - I lost my pencils a lot). Most of the time I would just stare at the wall, but sometimes we'd have some beads or shapes or something left over from another activity, and I would interact with these things that I could understand more. (Also, I just plain like sorting things - much how a kid might like to color in coloring books more than do math, I preferred sorting shapes to writing and using scissors.)
I didn't really get any training, formal or informal, except if you count my mom physically making sure I didn't hit myself or others (on a few occasions during this I have hit them, but I was so sorry about it and sad that I would cry and apologize profusely). I started diverting it sometimes to things like hitting and throwing remote controls and video game controls (my parents had to restrict access to video games because I would get frustrated and do these things, but I didn't really care for video games too much anyway). As I got older I would start to divert it to hitting pillows (at my dad's suggestion) and stomping my feet (some of the hitting and headbanging is because I have so much energy, and that was just the default way of releasing it when I can't just get up and run, such as during class or at home doing homework).
So it has dissipated significantly, but well I guess my parents' suggestions to divert it combined with their expression of their concern for me hurting myself count as an informal type of training. Probably if we'd had some outside help then I could've gotten where I am faster than I have.
Rocking and other stims haven't really dissipated, in fact, if anything, I do them more, however discouraged I have been from doing them. It's one of the ways I process information and handle stress, and I'm pretty sure everyone would agree that it's a better way of handling things than injuring myself. Each year of high school, by the second semester things go on a decline, and my grades slip to nearly failing, and I do my best to bring them back up before the semester's end. I keep an extraordinarily busy schedule, one that many NT students would find overwhelming, so it makes sense that I can barely cope with it, but this certainly wouldn't be possible without stimming. I used to suppress them, to little good effect, but that really was counter-productive to my goals.
I'm not sure what you mean by anti-social, and even if I did, I'm not sure how well I could answer that. I wasn't really given a genuine opportunity to be social unfettered until the 9th grade. I have undergone bullying from name calling to assault and battery from kindergarten to 8th grade, and under this cloud of intimidation, I had few opportunities to socialize, and not the energy when the opportunities did arise (I was too busy dealing with the bullies and the school work).
So I don't know if I would've avoided or sought socializing. Mostly I sought to socialize, but I knew by age 6 that even people who acted like they wanted to be my friend were likely just pretending so they could make fun of me behind my back. It seemed pretty pointless, though there were a few people I would consider friendly (unfortunately, one of these people in 8th grade turned out to be a jerk and called this guy in history class a *** because he obsessed with trains - I felt it was equally an insult upon me, aside from the offensiveness of her term).
In fact, I made very many attempts to communicate and reach out socially to my peers. Most of these were rebuffed, however, because of my "freak" status, and I decided that these people weren't worth my time, and in the process developed my own prejudices against people who have more typical interests and modes of expression (such as excessive talking), as well as prejudicing myself against anything stereotypically feminine, and these didn't start breaking down until in high school I met accepting people who were more typical in these ways, and I realized that just because the people I knew in elementary school were materialistic, spoiled bad apples, doesn't mean everyone is.
I started typing before I went to school. There was a Sesame Street computer typing program, and it typed in big letters, which helped especially as this was pre-glasses, and I didn't know how to use a big font or zoom in Microsoft Word, and didn't notice that my vision was blurry until my parents realized I had to squint and get up close to things before reading them (as a baby my dad let me type random letters on his typewriter). So I would learn words. My dad would always write in his notebook, and I asked what the words were. I remember learning the word "I" that day.
I wanted to be an author and write stories, so this was my main motivation. That, and I couldn't convey in speech what I could by writing (by third grade I would write on my own essays about the school system, freedom of speech, and injustices I would face such as being forced to dance with the boy who had tried to strangle me and when he cut my hands with his nails and I ran off to the teacher about it that I was the one punished and made to go to the principal's office).
I also wrote about things like if there was life on Mars and the evils of political campaign ads that don't address issues and just try to make each other look bad. In fact, it's because of my writing ability that I was able to transfer from the school where the worst bullies would follow me to, so in fact this early emphasis on writing rather than speaking perhaps is what kept me from dropping out of school and having a positive high school experience instead - not that anyone should be put into this situation in the first place...
In the case of siblings, I think it's very important that they are made to understand and not to focus anger towards the autistic person because of things like not being able to go and do all the things they would otherwise. You can't stop siblings from having some resentment, whether there's an autistic person or not in the family, but certainly they should understand things like the autistic person isn't deliberately not doing the dishes, or whatever it is they can't do (like go to a loud event, or appear normal). My sisters always complained about having to do stuff that I didn't have to do. I don't think my parents really talked much about autism to them, except for later on (apparently my parents had misunderstood when they asked me if I wanted them to know or not, they thought I'd said, no, I don't want them to know. or something).
So I guess that's pretty much what I have to say about this. Hope it answers your questions.