I think you will like it. You can do as much (excursions) or as little as you want. They are like a floating city (restaurants, casinos, bars, theaters, game rooms, pools, spas) with pretty much everything.
All you can eat food 24/7. Most is free, some charge. If you drink, sneak some in your luggage as those cute umbrella drinks are expensive. Royal Caribbean even automatically adds a 15% tip so make sure you read what you sign. Most have a formal dinner so take a suit jacket and pants.
How long is your cruise, 3,4,6 or 7 days?? Where are your ports of call?
Enjoy it, especially since it's free...
