Let me recommend an excellent cruising resource that I have been using for decades. It is a site called Cruise Critic. Think of it as a sort of seagoing TOTV.
Among other things, it contains an area where people who will be going on the same cruise can exchange information, give and take advice, and become acquainted prior to the cruise.
In most cases the group becomes an ad hoc affinity group that the cruise line will recognize and the line will provide a free meeting place for an initial "Meet and Mingle" so the people who have been becoming acquainted on-line can meet face to face. This gives you some people you "know" and can say "hi" to when you meet throughout the cruise.
The particular cruises can be accessed through the "Community" tab of the web site. However, you must register as a user of Cruise Critic before you can access this area.
Cruise Roll Calls
Most people who use this feature are seasoned cruisers and can give a lot of good advice about shore excursions available on the particular cruise in question. There is also a separate "Forum" area, similar to TOTV, There you will find reviews of the various cruise lines, Ports of Call, and particular cruises.
Cruise Critic Message Board Forums
There are search engines for finding cruise offerings in particular areas, on particular lines, and on particular dates. There is lots of good information for first time cruisers.
Cruise Reviews, Cruise Deals and Cruises - Cruise Critic
As I said, I have used Cruise Critic for decades and have found it to be a reliable resource. I last reviewed a cruise (Norwegian Sky in Hawaii) back in 2005, using the same screen name that I use on TOTV.
Pride of Aloha - Hawaii - NCL Review by Carl in Tampa
Enjoy your cruise.