Posting this on my burner for obvious reasons. I 19m have not been out as gay because my parents are mormon but I have known since I was probably 14. In the past i have hooked up with a guy and I enjoyed it. Then I met my girlfriend Hannah 18f. I was never realy attracted to girls or their bodies until we started dating but I find her beautiful. She makes me smile like Noone ever has and I find her sexy too. My question I guess is what do I do? How do I have sex with a woman after only ever knowing men? Is there a guide book i should read??? We have talked about sex and we both want to try especially her since she's a virgin. I just don't know how to make it good for the both of us.

Details that might be important.

I have been tested for stds. She knows that I have been with a man. She is on birth control but I have condoms. I haven't told her all my worries yet.

Tldr: how do I have sex with my girlfriend after thinking I was gay?