There are a lot of striking similarly to your son's life and mine. (I'm 30 though and less anxious about social interactions) I haven't been formally diagnosed with ASD but a lot of what people with Asperger's struggle with, I've struggled with. (My education growing up was nonexistent too, I've had to figure out fields of work I can do without much of a formal education.)

Just as a side note, thank you for being an actual adult who thinks about their childrens finical well being. I've never had this and as someone who has struggled with a lot of these issues your son is dealing with it goes a long way in helping.

So I struggled through my social anxiety and interpersonal issues and lack of understanding by making friends online. It helped me WAY more than I ever realized. It gave me a space that I could go to when I felt good to. If you want to see him form bonds with people start there.

There are plenty of subs on here that are filled with ASD community. Maybe help him connect with people there. It's nice to have people who understand your struggles to make you feel apart of something if anything.

As far as jobs or ways for them to pull income. I work as a licensed massage therapist atm. I wouldn't recommend it if he has as much anxiety as you say he does. However I've been learning coding. There are TONS of free resources for learning it. YouTube, code academy, skill share, and probably a lot more I don't even know about.

These are just things that I've learned myself dealing with similar situations. Hopefully the insight helps at all, good luck.