No teachers are required to learn swimming.First try to move your hands and legs once time.it is little hard to throw in once time but you will be successes with in few days After than go to swimming pool .you can swim little as frog .After some weeks you will be as a tadpoles and after some month you will be as fish.I learned like this .so i again say Practice makes a man/women perfect.
best regards
sentibhim

"Practice makes a man perfect"