Well, I know nothing of Florida other than it's legendary ability to induce epic swamp *** in any male over 50 lbs. My trip to Disneyland recently was fun, but I don't know how people survive humidity at that level without having constant lung infections due to breathing water constantly.
That said, EMT-B National Cert is pretty easy. There are no practicals, and as long as you pass them in your class you've passed them for nationals. Before you complete your class, you go to the NREMT website and register. After you finish the class, you apply for a testing. They will give you a list of available dates, you pick one and give them the name and address of the place you took your EMT class.
They will contact your school, confirm that your practicals were completed and that you passed the class. When you go in to take the test, it's a computerized smart test that will ask you more or less questions (all multiple choice) based on what you get wrong or get right. After you score competently in all areas, the test will end without giving you a score. You will receive in the mail the results a week or two later, though most people just look online to find out if their registration went though about two days after the test was completed.