How to sext!?

Okay, I am in a long distance relationship and I've been with my boyfriend for 14 months and we haven't done anything at all, we have talked about it but nothing else, no talking dirty no pictures, nothing and it's because I'm so nervous! I'm a virgin and I also am very awkward with this type of thing, The problem is that I want to try! Because I won't see him now until January and I want to try to sext and I know he really wants to do something, I mean he's a guy and he's holding it back just because I'm pushing it away.

What do I do though! If I try and he starts I feel like I should just avoid even though I want it and I don't even know how to talk dirty!

I just ughhh

HELP

Btw, I'm sorry if I'm confusing, I suck at wording shit😅😫