I suggest you pick up Ned Delouch’s book, "Diving Guide to Underwater Florida." I was able to do a different dive site everyday when I was in Orlando for a week and I knew exactly how to get to each dive site and what to expect when I got there. Best book I ever bought.
Ned dives with the guests at Amorie’s in Key Largo all the time. I met him once. He knows Florida diving inside and out.
If your near Orlando, for $150 you can dive in the Epcot aquarium. One of the best dives you’ll every do becasue you will never see the same aquatic life in a lifetime of diving.