Start small bro. I have always been quiet my entire life and was lacking hugely on relationship/social skills. I also hate social settings and anything to do with people. Id recommend frequenting a cigar shop. There you will find people who know how to shoot the shit and talk about nothing with skill the likes you have never seen. I just observed how they communicate. That's how ive learned to develop my social skills. Although I'd still call myself socially inept I'd say ive come quite a ways. Ive also made quite a few friends there over the past few years. Edit: stutter is still there but nobody really notices because I'm still really fucking quiet, and im really good at hiding it when I do talk.