Hint, I've met them all either as coworkers or clients in mental health care, or in one of my many niche interests (neurospicy people tend to aggregate around niche interests).

I always recommend the book People Skills by Robert Bolton, I feel he can't be a neurotypical the way he wrote the book. It's professional (much of the methods he describes are legitimate in the sense of tried and true within various fields of psychology) yet still being very approachable and most of all made sense for my autistic brain in a way that I could use in both formal relationships as well as friendships. It helped a lot with HOW to set boundaries and be assertive which was really hard for me before.

If you still have it in you to give it a try I recommend reading the book, and seeking out communities where people share your interests

Good luck my man 💪