You can move your pelvis if you want to. There isn't really a right or wrong way to do it, so feel free to do whatever you want.

Many women do not orgasm from sex, especially not within the first two weeks. It often takes us a little longer to figure out what we like and what stimulation will bring us to orgasm. So keep trying different things and see what works for you.

You can trying orgasming in other ways, then apply what you learned about your body in the process to when you are having sex.

I can't stop my pelvis O.o... It just moves it on its own!