It's not the face, but the expressions on it. It's not the voice, but what you say. It's not how you look in that body, but the thing you do with it. You are beautiful.
The white cube is not neutral - it carries its own cultural baggage.
I don't think you can ever do your best. Doing your best is a process of trying to do your best.
The only rule in art is that there are no rules.
You can be whatever you want to be.