Without assistance, you can see your vagina about as well as you can see your ear canal—you can absolutely see the opening of it, even if you can’t see the entire thing.
Not having very diverse friends may or may not be “bad” in itself. Certainly, having diverse friends is a good thing. But it’s hard to judge individual situations since sometimes it’ll just happen that you hit it off with someone who’s white. There are a lot of factors that go into making friends. But it sounds like your environment hasn’t given you many opportunities to meet people from different backgrounds and ethnicities, which is a shame, but not your fault. I think the only way to improve it is to be open-minded (which it sounds like you are) and to be aware of how unofficial segregation like this can affect people.