Go to karaoke if they have it! It is a blast on a cruise ship. Also, if you see more than one thing you want on the dinner menu tell your waiter you want to try both when ordering.
As first timers, remember that for a closed loop voyage such as yours, you don't need a passport but will need a photo ID (drivers license) and an original or certified copy of a birth certificate issued by a government entity. Of course, passports are best.
Please ask any and all other questions you might have. The membership in our little forum has more experience than you'll find in other places.