Falcon
Cruises are marvellous. You can go for anytime dining or fixed seating. If you do the latter you sit with the same people every night. Not many cruises have single cabins so you then have to pay double, but there's always plenty to do and see. There are group activities you can join in like art, line dancing, quizzes, gym things, tours, bingo,lectures, singles meetings.
Some lines have professional dance partners if you like dancing. There is always something to do and you tend to end up in a likeminded group.
You can go to AA meetings or friends of- ( lesbian) it's like a mini world.
Or if you like, you can just sit and look at the sea ( I do that a lot. I find it soothing)
I did a blog on my Iceland Norway and Faroes cruise. I don't know if it's still available on GN?
I tend to go with Cunard who are at the pricier and formal end of the market. Some lines are much more casual ( and cheaper) Princess are very nice as well. I wasn't impressed by my P&O cruise, but it was their oldest boat.