>>33460964 (OP)
I've heavily masked my autism for the last thirteen years, I haven't always been successful but it's a side of me that I've tried to bury and keep hidden as much possible. The most basic advice I can give is pay attention to how people talk to each other and to avoid bringing up any information that says more about you than you want or isn't relevant to the topic. Just listening to other people talk, like on podcasts or realistic/more down to earth media, helps as practice for getting yourself in the right mindset. Icebreaker topics like the weather and current events (non-culture war to avoid pissing people off) are important for getting yourself and the other person eased into conversation rather than jumping into the deep end right off the bat. Maintain three to five seconds of eye contact and then glance away for a brief second, not making eye contact and making too much both are off-putting. If you can train your voice not to be monotone (something I've failed at) and give yourself the right balance of facial expressiveness (not too intense and not too aloof) you'll look less robotic. Staying caught up on normie media gives you something to talk about, it doesn't matter if you don't care that much about it because normies only engage with trending shit to have something to talk about as well. Don't walk weird or have a body posture that's too stiff or fluid, that shouldn't be a problem for you since it's something that's pretty easy to pick up on but it ties into the general theme of finding the sweet spot between being robotic and overly expressive (AKA an effeminate fag). If you have a job or attend college it gives you an experience mindset that normies can relate to. Don't ever criticize or complain about something, no matter how minor or well-intentioned, because normies take any form of correction as pedantic. You might think that you're being helpful by educating someone on something but it's never worth it, just let them be wrong.