I feel very naive and immature, and my heart is blocked.

The society is very complicated. In fact, people like you are the best. In fact, many times, you just need to be yourself. You are not afraid of strong enemies or timid in the face of crowds. This is what you have to do. People always have to experience before they really grow up. Not everyone knows it from the beginning. Come on, believe in yourself, and believe that others will not care about your childish behavior. Come on, be yourself.