Im a newbie to
Disney cruise too, I am booked on my first cruise on Disney Magic ship in September 2020.
The main places I have been using for research are
1.Disney Cruise Official Website
This has a huge amount of information, deck plans, restaurants , shows etc. You can also research the different ports, routes and port excursions.
2. Disboards Cruise Section
I literally just took a few weeks and read back through about 200 pages, back to about 2017. Before that any information will now be out of date. I kept a notepad handy and wrote down notes as I read through the threads.
3. Disboards Cruise Meets and Cruise Trip Reports Sections
Again I just read back through various cruise meets threads and trip reports. Members here on Dis are really great for first hand information about all the cruises and routes.
4. https://disneycruiselineblog.com
This website has an amazing archive of Personal Navigators from all the ships and all the routes. The previous personal navigators from the various routes and ports will give you huge amounts of information.
5. YouTube
There are a huge amount of people who post all sorts of Disney Cruise videos on YouTube. Just search by ship name and 2019 to get the most recent videos about all aspects of the ships