7552 should be a great room. It is around midship and the noise level should be non existant. this site has room reports. You can go there to look up your room. It may only be lsited for the Wonder or both ships but the layouts are identical so it will be accurate even if its the other ship.
Disney Cruise Line Reviews of Staterooms, Disney Cruise Reviews
Your daughter should love the kids clubs. Their activities are geared for their age so she will have age appropriate things to do. If she doesnt want to go by herself you can sign in as a guest and go in with her so she can adjust.
The Mickey pool is shallow although quite busy, so she may like to just play in the ear parts or there is a toddler splash zone she could get wet in.
All the shows are geared for kids too. The Welcome aboard has a few characters but not as much as the rest of the shows. No worries if she talks or makes noise during the show, the theater is filled with kids doing the same thing.
The movie theater always has some cartoon movies playing during the day so you can take her to a movie too without worrying about her disturbing others with noise.
The clubs really are the best !!!
I would advise looking for a roll call thread for your cruise, join it and find otherw with kids her age so she can have a friend on board.
Which crusie are you doign?
Eastern or Western?
I can help with kid friendly ideas if I know where your going.