As a former NC diver who did his checkouts in the Florida Springs and his AOW in the Keys, I'll have to toss in the opinion that it is pretty nice to do those checkout dives in warm, clear conditions, before returning home to the lakes and quarries. I certainly wouldn't hold up my certification because of a pending FL trip, but I enjoyed the experience of diving under both sets of conditions.
Walter's right about becoming familiar with local dive opportunities, though. As a new diver, it's important to gain experience by diving as often as your schedule and budget allows. Each dive gets a little easier, and with each dive you grow a little more comfortable in the underwater environment. Learning the ins and outs of your local dive sites with an experienced buddy or instructor is critical to developing good dive skills in those environments. (Incidentally, Walter's right about most things pertaining to diving, at least as far as I've seen!)
Anyway, whether you come to FL for a cert trip or as a credentialed diver, be sure to look us up and let us know when you'll be diving. Chances are, you'll have a bit of moral support from the Conchs...
Best wishes and safe ascents,
Grier