Could I be a Dolphin Trainer?

I just love all animals, but I especially love Dolphins, I have been to Sea World 3 times, and everytime I go ims so inspired! I live in Canada, so I was wondering if it would be hard to be a Dolphin Trainer,. Im a competitve Swimmer, so that would help, and I was planning to start volounteering at one of the pet stores, and the vet hospital, but what else can I do to make the possibility of being a dolphin trainer better? thanx and im 13