Until December? Oh no! I'm sorry you have to wait that long - I had no idea it was so hard to get codes right now. (I'm not actually involved with it in any way, except as a user.)

It's hard to give you advice if you can't play around with the archive yet - maybe look through the fic and get used to the interface so that you'll already know your way around when you have the opportunity to explore the fully-featured archive?