The lobby is on the second floor. There are no rooms on the first level, that is the parking garage area. Best animal viewing is from the 2nd or 3rd floors. Any higher and you start getting into the tree tops which blocks your views. Ask for a room near the lobby if you don't want a long walk. However, I would walk for a better floor level especially if staying in a savanna view room.
I don't know if you can see the pool from the rooms, never stayed on that side of the hotel. The pool is near the Rafiki section and I would think you would need either 4th or 5th floor to view it. It sits up higher than the garage level and there are trees surrounding it.
Hope that helps.