See if you like snorkelling, see if you see anything legal to shoot. If you can get shots set up in your mind, you're probably ready.
The typical sheepshead in Florida is like this one.I've passed on every single west coast sheepshead (including giant ones at Cortes bank) I've ever seen but those look pretty bomb.
For a pole spear, I'd have fun doing it this way - check the viz at a beach area from a pier or bluff and if it's top to bottom, swim out near where guys are shore fishing, only a few yards out and shoot the heck out of surf perch, and then and fry them up at the beach picnic/bbq areas. If you're lucky you might see a school of corbina, or a halibut to take home.