You gotta find out who you exactly you are or who you wanna be. Of course you'll make mistakes, I mean who doesn't? Whether it's because of tattoos, colored hair, makeup, piercings, sex, and so on, you have to not care about what people think of you. Let em' think what they want cause they're not giving you the chance to prove them wrong. Finding your place in the world should mean that you know exactly who you are. It's about only satisfying yourself and making your own decisions. You can't give up on life without leaving this world without a meaning. Believe in yourself and who you are cause you are who you are :)