I had no idea where to start either. My co-workers daughter is a travel agent so I reached out to her, gave her a list of what I wanted, expected, wanted to avoid, length, date range, port preferences, destination preferences, whatever I had in mind, and she found several different options for me to choose from.
We live in FL, so a close port was preferable, no/few kids, 1 week long, room must have a balcony, all-inclusive drink package, and we had no preference on destinations. We have everything we wanted and it’s been wonderful. If you’re thinking of wanting to book a cruise, and if you live in the US, I can send you the travel agent’s info to get the process started.