Ahoy Chris!
I'm so excited for you! Your first Disney cruise?!? You are going to be sooo spoiled by the time you get off of the ship. The Disney Magic is just beautiful. I've sailed on it three times with my family, and we love it so much we are planning another adventure on the high seas this year.
Gratuities are welcome as part of recognition of excellent service, and you aren't going to believe the level of attention and service that you are going to be receiving from the moment you check in your luggage to the last minute when leaving the cruise terminal. I've sailed other cruise lines, and I can truthfully say that Disney Cruise Line is exceptional and can't be compared. Take a look at the suggested
Gratuities and Tipping page that I've attached for you. This way, you can take these expenses into account before your trip.
You can visit Guest Services the evening before you disembark and have the gratuities charged to your room expenses. Of course, if you want to handle it personally you are welcome to do so.
I hope this helps your planning. Bon voyage!