I've been asking around about this topic too.
I'm a seasoned small-craft sailor (used to be an instructor). The CBR marina has two sailboats - both Sunfish, which are one of the easiest small-craft vessels, you shouldn't have a problem.
The cost is around $20 an hour. However, I think we have decided to go over to one of the MK Deluxes, probably the Contemporary, for our sailing - Bay Lake is much bigger and those boats get used more often (and therefore maintained more often.) I've also been sailing at the Contemporary before and had a great time.
Hope someone else can weigh in on this topic!