Very good call on the local shaman thing, great place to start.

Also look for music events in the electronic/psy trance scene (Spongle being a great example). Attend some of these events... And don't be afraid to talk to strangers. Its a different crowd at those things.

I have a long and beautiful relationship with cannabis... 25 years plus... But if it started bumming me out, I'd be done right away. I think of cannabis as an enhancement to things I already enjoy: music, painting, being outdoors. I don't think it's an effective way of dealing with depression (although I find it very handy when I'm feeling angry or impatient)

I don't have any real advice about being more social, except to do it. And be yourself- no need to try and impress with coolness (that's how I used to fall flat on my face in social situations). Be positive around others, give thanks and compliments when deserved, be a good listener. You'll find your rhythm. Remember that self loathing is a cycle that feeds itself. You are only 22 and still finding yourself- it's a powerful asset to be able to forgive yourself for your weaknesses and failures. Because you will have plenty, and there is no need to feel burdened by them.

Also remember that everyone around you, including the most charismatic, have insecurities and self doubts. It's not just you.

I think that you still could learn a lot from the psychedelic experience. Rushing headlong into DMT is a little extreme and probably not necessary. If it comes around and someone offers it, then the timing is probably right. Talk to your local shaman and see what advice they have. In the meantime, if you do manage to broaden your social circle a bit, some trustworthy acid or shrooms might come your way.

Again... Trust in the process. You are already on the path. One day you'll look back at this moment and it will all make sense. Take a deep breath. You are far more powerful and beautiful than you realize, and you will grow into that.