1) You can take your time, but not too long. Usually I'd say about a minute or so.

2) Most poker rooms are the same, go up to the front desk in the room, give your initials, and the game you'll like to play. Example I say "AK 1/2 no limit" 1/2 nl is pretty much the lowest limit out there

3) Wait times depend on how many tables are in the room and how many people on the list. I've never had to wait for than 40 mins (usually 15-20)

If you're going to AC, I would suggest Borgata always. It has the biggest poker room. or Foxwoods, they have 100 tables PLUS tournament section.