Skydiver firms are of two varieties- the C182 mom n' pop kind operating from a small hangar on the one hand, and Twin Otter or King Air, crank 'em thru high overhead operations on the other.

As for the mom n' pop firms, they need 25-50 hours in type (C182) and some sort of training in skydiver pilot ops. This is to get you approved with the insurance firm. There are schools for the skydiver pilot ops but it will be a cold day in Zimbabwe before I would pay for this sort of training. Just keep asking them until they agree to let you ride along on loads and when you have done this long enough to convince them you are serious, they will let you show them you can do it alone and then you are off an running. The mom n' pop firms are easy to get on with but they don't pay very much and they usually have several hobby pilots like me already on the roster because it's fun and not very formal. If you want to find one of these firms then just google up where they are and go visit them.

I don't know what there are in terms of the high-overhead operations in Florida, and there are none in Kansas, but there are several in Georgia and getting on with them is difficult unless you are already fairly experienced in turboprop operations.