I'd like to give it a try, but I've never played before. Is that okay?
As far as I'm concerned, sure.
Again asking how do you play?
Right now, you don't
We still have to find someone to play GM. I have PM'ed PiT who said he'd be willing to do so, but that he's afraid he won't manage to fit it into his roster. So preferrably someone else will step forwards to volunteer, or otherwise I''ll have to spam anyone who I think might know the game well enough to play GM.
If you want to get a grasp of the game rules, there are plenty of online rulebooks which will pop up if you google 'Diplomacy rules'. The game board would be posted in the game thread and you'd have to PM your orders every turn to the GM.
Hope that answers your questions.