Now that we are back to being lovey dovey, someone needs to help my ignorant tush!!

I would consider myself bisexual.. I've always been attracted to men and women.. when I was younger I went on a few dates with a woman, we made out all hot and heavy and it was awesome! Now that I'm separated, I was considering pursuing this girl who's shown interest and I realized..........
I am essentially a virgin! I have no idea what I would be expected to do if it got to a pants off type scenario!
This girl knows that I went on a few dates with a girl so I'm assuming that she thinks I'm experienced! And I'm soooooo not!

Help an embarrassed girl out!!