Also newly divorced and in my 50s, sadly not retired yet, I am not quite going solo, I do have a solo cabin on MSC going out of Port Canaveral on April second. The price couldn’t be beat- rate included drinks and wifi , I think it was $560 for 7 nights.
Debating my plans for my next cruise, this one will be truly solo, maybe Alaska, maybe transatlantic, I am watching prices now.