Miami Boat Tours Question About Vacation To South Beach, Miami..?

Question about vacation to South Beach, Miami..? - miami boat tours

This is the first time in Florida and I really do not know what to expect. Go First, I want to dive, I've never done, and I have no idea where to go or costs. Below is a boat that we will be held on the islands for a tour? And there are other places that you recommend in South Beach? Thank you!