One thing I love about cruising is meeting other people. My GF and I just went on our first cruise without kids on Oasis. We met a few people traveling alone. There is a bulletin board in guest relations area and there are un planned (by RC) events that people post. AA, card games and single events. Oasis also had a few singles only events too.
We had my time dinning. Our first night our waiter was excellent. Second night not so much. More of a case of first waiter hitting it off with us. So every night after that we requested him. A couple times we had to wait a few minutes but never very long. They will ask you on My Time if you want to sit alone or with others. We choose alone but often ate meals with others.
You're going to love Oasis !!!