Also get on the water, any way you can. Have friends with boats, go out with them. Know a party boat that may need a deckhand, jump on. Yachting may seem a bit glamorous, but first and foremost you have to like being on the water. And not just in the bay, but out in the gulf, on the ocean, etc.
I'm curious though, did you have this desire as you put your four years into UCF and marketing? Spending all that dough for your degree and then realizing that you want to "change your major" is a big swing. Good school, UCF, but not cheap (two of mine go there).