We did our first cruise December 2004 on the Carnival Fantasy, 4 night. We also started witha short cruise at first. My husband was very excited but I was extremely nervous and worried (I was afraid of boats). Well, let's just say I was nervous and worried for nothing and I am no longer afraid of big boats (still afraid of small ones). We had a great time and will be planning our next cruise soon. Just trying to decide where and when.
Have a wonderful relaxing time. The best part of a first cruise, at least to me, is everything was new so it added to the fun. I was like a little kid in a candy store.
Be safe and let us know how it was when you get back. Be sure to take lots of pictures. I still take mine out and look at them.