I am widowed and, like you, I am also a senior. I would describe myself pretty much the same as you. I am anxious to try the sharing because, as you will see below, I am now ready to do a number of cruises.
I posted a 5/22 inquiry for a Greek-island and/or transatlantic repositioning cruise (or cruises), eacg of which my wife and I took a few years ago.)
But, as you'll see, if those fall through I am also interested in a Nov or Dec, 15-day, RT, San Diego/Hawaii cruise (done those twice before.)
I love the days at sea, socializing, dancing, reading, snorkeling, whale watching, bridge and relaxing.
Let me know if any of this sounds intriguing.