There you go again using the moral/immoral language!!! Kate, everything starts with the language. Before you embark on your wonderful, exciting sojourn post-JW I would highly recommend losing the JW language ASAP. I immediately quit using term such as 'the truth' when referring to JWs. Change your language and you will be much happier. I won't let others choose my 'morals' for me, and I like myself and feel more ethical and decent now than I ever did as a JW.
For what it's worth, I have been single for 19 years and for most of that period i was not in a relationship. I very much lived a bachelor's life but I am picky and selective. Even so, I enjoyed my life VERY much. But I was also very honest with those with whom I had no desire for a relationship; it is what it is. Of course it isn't 'immoral' to date a much younger man. Or woman. Or both. At the same time. Just be honest, take reasonable precautions and enjoy.