I think an aquarium is a bad idea. Not enough air circulation in there! I have never seen a bunny in one. There is plenty of information at http://rabbit.org on everything from housing, bedding, and especially how to rabbit-proof your room! (Hide all electrical cords, or they WILL get chewed through. Those big rabbit teeth can snip a print cable faster than you can say "No!")

Read up on that website, then I'd be happy to answer any specific questions.