I learned to talk to people at my first job as a server where I had no choiceI'm a bartender so that has helped a lot but even before I got this job I was putting in effort with coworkers/friends of friends. I feel comfortable talking to anyone now, I am still quiet though because I don't like talking to people not because I'm afraid to talk to them anymore
They were like, "you're kind of quiet you should be a cook" and I was like "no I want to be a server". Now I'm not afraid of talking to people anymore (because customers are scarier)
I'm still pretty shit at talking to people at parties and I just clam up. Don't know how other people do it