Speaking as a father of two ... 18 and 20 ... please, please, please wait to get into technical diving until you're a bit older. There is SO much diving to do and enjoy without the need to begin the technical path. Enjoy the awesome diving that Florida has to offer. Focus on solidifying your basic skills ... buoyancy control, trim, air sharing, mask remove/replace, no mask, propulsion techniquest, etc. Think of the extremely solid foundation you'll have at 18 to begin technical training if it still interests you.
I could possibly see you doing cavern, but adv. nitrox, deco. procedures and trimix really should wait. It's not just your age but also the amount of experience you have. At 48 dives you're really just beginning your diving career. I know I was ... and still am at 150+ dives.
Another thing that concerns me is that you haven't mentioned why. I'd make that comment to anyone whether they be 15 or 35. Why do you want to get into tech diving? It's not something to do just for the sake of doing it. There really should be a clear purpose to why you need to begin deco diving or cave diving. I've heard it said that unless you've done all of the purely recreational sport diving you dreamed of doing when you first learned to dive then you shouldn't move into technical diving. If there's still more to do and see within sport limits, go do that and see that first.
Slow down and enjoy the diving you're already qualified to do. Tech will be there in another 2.5 years ... or 5 years ... or 10 years. There's really no rush.
