Started cruising solo last January. Loved it. You can do as much or as little as you want. Requested a table alone in MDR. Plenty of people around to talk with. Met so many nice people. I think the staff gives you extra attention being a solo. Took my 2nd solo in October. Have 4 more booked. The family knows that solo cruising is the only way I cruise now.
I never felt unsafe on my first solo in January. I stayed 2 nights in Ft Lauderdale before cruise. I took a taxi from airport to hotel and from hotel to the cruise port. The hotel was on 17th so you could walk to shopping and restaurants. When I take a taxi I take a photo of the taxi number and the driver and send to someone back home. The driver knows I do it and it gives me a sense of security. Will be traveling solo in October and January.