I’m autistic, I’ve had one haircut since covid because I hate the sensory aspect of haircuts. I’ve been searching online of how to cut hair and it doesn’t look that hard, but a lot of people seem to advise against it. I think that if I fuck it up it’s not the end of the world, I can just go to a professional. But I have very long hair so I have a lot of opportunity for trial and error. I think that if I get some practice, it’s something I can continue to do going forward. I also don’t particularly care how it looks, I just want it to be shorter.
Watch videos and practice on something that isn’t you if you can. It’s easy to goof up with long hair if you don’t use the right techniques. I have been clipper-cutting mine for over a decade now. Obviously that’s much simpler but it still took practice.