Need a little advice.

So I'm 16 and me and my boyfriend are going to do it but I'm kinda self conscious bc 1. In my inner thighs I have 2 dark spots and they just recently popped up but idk how to get rid of them bc it looks like dirt but it's not I'm a very clean person. And 2. My nipples aren't hard there're like non existing so idk what to do.