Which pools were you interested in? I didn't spend any time at the adult only pool. You will probably want to as a CM on board for directions as the ship is huge and it is hard to know which way to go at first, but on the family pool deck there is a ramp to go up to the pool level.
I do not believe the aqua duck is accessible at all.
I recommend calling ahead and asking your specific questions for your situation. The pools are often crowded, but not always.
Are you getting an accessible room? The doors in the regular room were JUST wide enough to fit DS's pediatric wheelchair.