How to get girlfriend to try new positions?

I just started dating a new girl a few weeks ago. We already have begun to connect on a deep level emotionally. Once when we were cuddling on the couch alone we started talking about sex. We both agreed to wait a few weeks before doing it which I am perfectly ok with. She then said that she doesn’t like to give head, and she doesn’t do doggie style because she was apparently traumatized after an incident when she was doing doggie style with a different guy and the condom ripped so she was freaking out because she thought she would get pregnant(but she didn’t). She told me that she is just “a simple missionary girl”… I didn’t say anything at the time but this is a problem for me because as a man I enjoy receiving head and doggie is my favorite position. Plus I have been in previous relationships where the girl was wild and would be open to several different things. I don’t want to sound like a sex obsessed jerk but I would like to help my girlfriend overcome her bad experience and be more open to different things in bed. Doing missionary over and over again would get extremely boring. I understand we only have been together a short time and I don’t expect to change her mind right away. I just want to tell her in a non forceful way that when we start having sex that I want her to be open to different things…