Sex is terrifying to me

I want to have sex so badly but I'm (23 M) terrified of it. Mainly because if I don't do well then the girl is going to humiliate me, tell all her friends, and it's basically this big exam where if you don't get a good grade then forget it. I don't have a lot of stamina or strength. I feel too "feminine" to be what girls want in sex because the idea of putting my dick in a vagina just feels so wrong to me. I don't even like looking at my dick.