A virgin who doesn’t know what they’re doing

Okay so me and my guy have been together almost 9 months, and he’s had sex before in fact his body count is 6...anyway I told him in the beginning of our relationship that I wanna wait till marriage. But lately I think he’s the one I wanna give it away to because I think he’s the one I’ll end up marrying. But to the point already I wanna know what position would be best to me to lose it to, I know it’s gonna hurt no matter what for me but I want it to be enjoyable for both of us and memorable for me as well as the least amount of pain as possible.