Glad you found it useful. Never cruised before is not something I would be worried about at all! I don't think there were many paralells to my previous cruise.. except maybe expectations over state room sizes. These aren't land hotels
I think the biggest concern anyone should consider is 'Do you like Disney 'sheltered' entertainment? AKA their tone and emphasis. If yes, then I think a Disney Cruise is certainly a viable choice. The 'being on a boat' aspect is really minor. If people have traveled via air before, they will be familiar with most of the boarding/packing requirements. The only thing I would suggest becoming familiar with is the port adventures (so you can book right away) and the way food is handled on the boat. The rest is 'take it as it goes and enjoy'
While a different style then a parks vacation, it definitely is a step up in service and atmosphere.
A tip passed on from Teresa (fairygodmother travel).. don't be shy about making a reservation.. because as long as you are outside of the cancellation window (like 75 days out for most.. check before of course!!) you are free to move the trip, cancel it, etc. She mentioned people often book reservations while on board because of the discounts offered to rebook a cruise, and then simply change it at a later date when they really know what they can really do.
I think the larger travel industry has gotten everyone so conditioned to be worried about changes that people are hesitant to sign up unless they think nothing can derail it. Disney at WDW is VERY generous with the cancel policy, and DCL is pretty good too.
Talking with an agent like Teresa can really help with topics with lots of choices like the staterooms. I was 'lucky' in that I wanted all of us in one room, so that narrowed the choices greatly. Doesn't make it cheaper, just more straightforward