"self talk" will help. Nothing is obviously here, people are not judging. Its your opinion of yourself that matters. I had the same problem my first performance on stage of guitar concert. After that I always try to improve my confidence. My tip is that I practice my song in front of the mirror then record myself. Keep on repeating doing that. Ask your friends about the song... Other wise, you should stand in front of the mirror, look directly into your eyes, then yell out loud "I AM GREAT". I know It's sound pretty crazy but It's will help you a lots. :))))

The best way I do this is just not care about what other people think…It's easier said than done, but it will help you become more confident, and also a better speaker in any language.

people are not judging, I think. Usually people just want to communicate and they are hoping to talk to you. You need to be brave and not worry about making mistakes. People don't mind mistakes.