I can remember similar conversations with others in the past. The fact is that, if you are a diver in North Central Florida, you are going to dive the springs. I'd much rather see someone take proper training to enter the overhead, than see a bored OW diver, trying to push his dive count up to some arbitrary level, decide to go in "a little ways". There are instructors whose judgment I totally trust to decide if someone is ready to dive in caves, and the man who has been involved in several hairy diver rescues is one of them. I'd cheerfully dive with the OP.