You'll get more info on nanfa.org, there are several people from the central florida area. I'm in the panhandle myself, but there are a few basics.
You'll need a dipnet, you can use a cheap 1/4" mesh net from most sporting goods sections, but they tear up fairly easily, and the mesh size lets some of the nano species slip through.
I have a 'perfect dipnet' from jonah's aquarium, it was a little pricy, but it has withstood plenty of torture.
You'll also need a container to hold the fish. I use a regular flow-troll bait bucket, and I keep an igloo cooler 1/4 full of fresh dechlorinated water in the car. In between stops I dump the fish into the cooler and they are good to go for the rest of the trip.
If you plan to keep any aggressive or predatory fish, pickerel, etc, then you'll need a way to separate them from the other fish so they aren't snacking.
For small specimens you can always bag them and put them into an insulated box, they'll keep for a few days in optimal conditions.
You basically want to look for aquatic vegetation and run your net through it. Offshoots of rivers, bends in creeks, and even drainage ditches are usually pretty good spots. Once you get out there and start looking around you'll get an idea of where to go.
There are other fish caught in the clearer water, darters, shiners, etc. They are a little more tricky as the shiners are usually too fast to be dipnetted. You can use a seine net (I'm terrible at this), minnow trap, or even a tiny hook and line setup. They make these things called 'sabiki fly rigs' that are used to catch saltwater bait fish, they just so happen to work great at catching shiners also. You may have to tip the hooks with a piece of worm to get them interested.
One other important thing is to get a temporary out of state freshwater fishing license to cover you while you are here. Also get a 2nd edition peterson field guide (about $15 on amazon) to help I.D. your catch, it's an invaluable tool. Do not keep anything that you can't i.d., as it might be something endangered or restricted. If you have a smartphone you can always take a pic and upload it on site, I'd be happy to give the I.D. a shot.
There are some guides over on nanfa that go over the basics, but if you have any other questions just ask.
P.s. watch out for the tons of snakes and alligators.