I would suggest that you post your question again saying which ship you are on. Usually you can store your luggage under the beds but bathrooms vary from ship to ship and even on the same ship depending on the grade of cabin you have. Why not look in the ships website. Most give you details of cabins and other information
Space is not too bad. beds are high so storage underneath. Theres a double wardrobe, chest of drawers, safe, and the odd small cupboard.Bathroom depends on what you paid for, most are shower only, unless you have paid mega bucks for the bath.