FaceTime sex (need advice)

I’ve been in a long distance relationship for 6 months now, my bf is not a virgin but I am. I also lack co disenchanted in my body. It took me some time to be comfortable with doing things with him over FaceTime. But I e yet to take initiative in starting it, I want to I just don’t know how to dirty talk or at least when I think of something to say I feel like I’ll sound like an idiot. I just need a little advice on how I should go about it. It’s gotten very frustrating for the both of us, I’m just not sure how to get out of my own head about it.