Most dives in the florida keys are 50' or less, unless its specifically a wreck trip which will be in the 100-130 range on average. Most resort town dives that i have been on (bionare, cozumel, BVI, aruba etc.)have been intermediate level dives(drift dives, deeper dives etc.), however there are plenty of shallow dive spots in those places as well. You may have to shop around to find a boat that is doing the type of dive that you want to do on that particular day. If you have no other option than the intermediate dive, let the DM know your skill level, and keep close to him/her. Most DM's that i know are more than happy to walk you through some more challenging dives, and will take good care not to put you in harms way. Just remember to take care of your DM afterwards, and he'll take REALLY good care of you on your next dive with him.
Have fun, and enjoy some good dives.
Have fun, and enjoy some good dives.