If you are sailing ( no motor) you probably will not need a license.
If there is a motor involved you will need to check with the state ( fla) to see what they require. If they require a license involving a boating safety course it will more than likely cover all the basics but will not be sailing specific. ( mostly Rules, laws, safety etc etc.)
Beyond that, if you want to learn to sail after you take the safety course...ASA and US boating have schools everywhere.....and joining some wed night racing will help.......as has been mentioned already.