Mrs. Moose, cruise travel is one way to visit countries and cities. But not to take advantage of all of the good things and amenities of a cruise, especially on a luxury cruise line, is perhaps somewhat of a waste. Meeting fellow passengers, talking to staff, spending a little time with locals ashore, is only a fraction of the pleasures of cruising.
Having gourmet meals , properly prepared and served is usually an experience not always available at home. We have met passengers who just want to be left alone and never join activities or even shore excursions. Such a waste, BUT, chacun a son gout.
Try cruising, again, Mrs. Moose. Although I am a young 79 I learn something every day, and from people i meet for the first time. Try some of the day's activities which are available. I sometimes curl up with a book on the observation deck and "don't bother me !!) But to keep to oneself is to miss one of the pleasures of cruising.
Perhaps I have misinterpreted your review. Pardon the pun, and my British humour, but for your first cruise I rather suspect that you have "missed the boat !!!)