The Genuine advice which is completely useless: -
Do not worry much, Be yourself. Everything will be fine. I don’t know why people say these ( Including me ). I learned today, First is to fix yourself and then be yourself.
I agree with what you are saying somewhat. So when people say, be yourself, they don’t mean that you should not try to be better or you should not fix yourself. Instead, they mean that don’t let your flaws make you under-confident. Work on your flaws but don’t feel bad about it, because everyone has some flaws.