Trying to find something

I come from a normal family background, was slightly bullied by my classmates and teacher but nothing mayor, but thanks to that I find myself losing interest of holding a friendship. Years had pass and now that I found a place were I don't feel so oppressed by everything, I am unable to communicate well with my classmates or find ways to do it since I had a long time not doing anything about that. I know that I am kind of dumb by having this mentality but that I why I am here, to seek help to help me get over something and learn how to interact with people my age. I am 19 by the way. I have kik, WhatsApp, and Discord. PM me if interested