Self-Acceptance

I am confused with how to fully accept myself for who I am.
I understand that I am a unique being and that there is no other like me. Does wearing makeup and fashionable clothes make me someone who does not appreciate the real me? Does participating in this make me someone who wants to be less like myself and more like someone else?
Is wanting to be the best at something (eg. a sport) a selfish act? Are goals and dreams to win at the highest level selfish ambitions?
I appreciate your help in advance.