Just be confident, Im socially awkard too, but im gradually getting better,
I don't know how old you are, but you have to practice talking to people, cause like your gonna get walked over your whole life.
Just say whats on your mind man, and never care what people think about you.
As for the girls, just make em laugh, if you can make them laugh you got their heart, just try to find somethign intresting to talk about.
Bring up any topic.