That's exciting!
It will be a trans-vaginal US. They'll be looking at the embryo, making sure it is in the uterus (not ectopic), making sure there is only 1 (or maybe not!), etc. They'll measure the fetal pole and you will hopefully get to see the baby's heartbeat (but not hear it yet).
They will definitely be able to give you an idea of your due date. I'm not sure of my exact day either, I will find out next week
I can't think of any specific questions, this is mostly just to make sure things are starting off on the right foot and get some info. It's too early for anything more detailed, really.
Hope this helps and good luck!
Answers
OP - you've got two other threads started about baby bumps, and there's a whole HDBD thread on here for people to share their bumps (and I think they've all shared how far along they are, as well.) I don't know what info you're looking for since everyone's body is different, but start there.