After spending the last two days relaxing and swimming, I spent some time going around the island looking for a dive center that had a prescription mask that I could see through. As it turned out, I was only able to find two, so I decided on the one closest to where I was staying, and booked on to their course starting for the 10th, at Blue Heaven Divers. This diving center has french instructors and is run by a Japanese person Hiroaki. I'm going to be a qualified diver!