If you want to do this for fun, that’s great. It can be fun. But there are too many people doing it too cheap. You might find some decent paying gigs, but most boat owners will want you to do it for peanuts.
There is plenty of tugboat work around. You can only spend so much time on a boat away from home. Why bother if your not getting paid well to do it?
Daywork123.com has a lot of temporary yacht gigs and deliveries.