Sex positions

Hi guys, so I’m a 22yr old who’s been with her bf for 7 years, he’s the only guy I’ve ever been with but that’s not the problem, the issue is I feel as though I lack experience as well as most positions hurt; My doctor told me that I have a slanted uterus and that it’s normal so I guess my question is does anyone have any positions they’d recommend for someone like me trying to explore there sexual side while being comfortable and able to enjoy it?