Patience...
Here are a couple of things to keep in mind:
* Rates depend on when you travel - if kids are out of school, rates will be high
* Rates start cheap when release and they go up as the ship sells
* Rates come out about a year and a half ahead of time - (up to April 2015 right now - rest of 2015 very soon)
* You need to pay a 20% deposit, balance in full 75 days before sailing
* You MUST get
trip insurance - it's not the same as the parks
* Although everything is included pretty much, excursions, tips, pictures, alcohol are typical things that will add up.
* Start with a 4n - a 3n is too short, a 7n could be too long
* Pick whatever type of stateroom you'll feel comfortable but note that most of them are balcony.
* Prices are fixed by
DCL - there are no discounts (other than last minute promotions by DCL). But a TA will typically give you some on-board-credits which can be used towards add-ons mentioned above (tips, excursions, etc).
Good luck and enjoy planning ahead!