I want constructive critisism for my feed back. thank you

This I believe...
I believe confidence is very important in every day life. With out it, it would be hard to accomplish very much. I used to not have a lot of self confidence, But about 6 years ago while playing soccer I realized that i needed confidence. This was about the first time i ever really played soccer in an actual organization and i wasn't very good. Almost every time i tried to get past someone i always doubted myself at the last second, and a lot of the time i got the ball stolen away. My mom noticed that i was always ashamed and upset with myself even when we won. She asked me why I was always upset after a game and I told her it was because i could never get past anyone is soccer. Then she told me one thing that changed everything and i will never forget it, she said "its all in your head, if you have confidence in yourself and don't hesitate you will have a much better chance of getting past people, this will also help you out in life". I thought about her words for a while and realized it couldn't hurt to try. It was a little hard at first but i tried and started to notice it was working. For The rest of the soccer season i scored around 8 goals per game and I've felt a lot better about myself ever since that year. That year changed my hole look on things. Now I always have confidence in myself no matter what i do. From homework, or a big project that's due, to sports, and activities I'm doing, I always have confidence that i can accomplish it. For the past few years I've been encouraging my friends to have confidence with anything they do or try to do. I've noticed that a couple of them have been doing much better academically and the others are very athletic and it seems to me like they are very good at almost any sport or activity they try. This is why i believe confidence it very important to be successful in life-so that's why i want to encourage everyone who doesn't have confidence in themselves to try to. I know its not easy at first, it wasn't for me but now i am self confident and feel a lot better with myself when I'm doing homework or playing soccer, or doing anything for that matter. Now i find myself doing good in school and I'm on the A team for a competitive traveling soccer team, and it all started with those few works my mom said to me that changed everything and i will never forget that moment. So that's why i believe confidence is the key to success.