Is the start to my book any good or should i start over?

please please dont want to train dolphins!!!!! it just helps them!!!!! and by helping them we are making the captivity of dolphins and whales problem not go away !!!! bc if we realy loved them we would let them live in there natural habitat!! if u think im a loony wierd o whatch the movie The Cove and tell me you still want to go swiming with them!! and cuddle them and stuff im not trying to be mean i just want to get the word out!! whatch the movie The Cove!!!! dont touter the dolphins any longer!!1!! and dont say i dont under stand bc i wanted to be a marine mammal trainer sooooooooooooo bad it was the only thing i ever wanted to do or the only place i ever wanted to be was training dolphins but then i leared how un happy they are there and it brok my heart and i realy love those animals so i droped my dream of being a marine mammal trainer and now i want to be a marine biologist and just study dolphins from a distance not from a close in a concrete cage!!!!