Looks like you got a great start! Rook looks like he's enjoying his new place. It really does make him look super small. Is that a 15 gallon? I doubt he can get to the top of it if it's a 15 gallon, but I'd recommend setting something heavy (a heavy book, maybe) on top of the lid. Those lids aren't very secure and snakes, especially small snakes can easily escape them.