Help a virgin out!

Okay so I’m a 17 year old virgin and plan to stay that way until I get married because my fiancé and I are currently planning our wedding and don’t have much longer so we’ve agreed to wait. Sexually speaking, he has slightly more experience than I do. We are a long distance couple because he is in the military and we’ve had phone sex a few times and made out lots of times but never gone below our clothes in person together. So basically I’m just feeling nervous about sex after marriage because I know all of the things that are

supposed to happen on his end but I really don’t know what I’m supposed to be doing. I don’t want to embarrass myself. Could anyone explain what a girl’s supposed to be doing when she is in the lead??? I know it probably sounds sad but I’m just trying figure all of this out lol!