I need to loose weight...

So I am currently 14 years old and I noticed when I was about 12 years old, my belly was a bit fat. So now my stomach is still fat and I’m very embarrassed about it. Not only is my stomach fat, I have a little of a double chin, armpit fat, leg fat. I don’t really look so fat thought but I think I do have a little weight. When I was a kid I was really skinny and now I gained weight. I do play a sport but it’s only in the fall and besides that I don’t exercise much. Is there any way I can loose some weight and make my body look better? BTW my current weight now is 126.6 lbs. In March this year when I had my physical I was about 115 lbs.