Hello Jake! I'm glad that you know now how to do the butterfly stroke. Here are your corrections. ^_^

I learned swimming one summer when I was in the first grade. My mom signed me up at the local community swimming center. She wanted me to learn how to swim because she doesn’t know how to swim. When I first started learning, my teacher taught me how to float in the water. He said, “Just relax your body. Then you can float on the water.” I didn’t have any difficulties with floating. Fortunately, I didn’t have fear about water, that’s why I learned how to swim quickly. I learned swimming strokes like back stroke, breaststroke and freestyle. I liked freestyle swimming especially. I also want to learn butterfly although it is the toughest stroke because I think it looks cool and it will help my shoulder to broaden up. But, I had a problem on my ear. I went to the doctor. The doctor said “You have to stop swimming. There's water in your ear. That’s why you are in pain." I can’t do anything bout it, but to stop swimming. After I entered college, I still wanted to learn butterfly. I signed up again. Finally I learned it.