How do I lose my unwanted belly fat?

I am 13. I am 5’3. I play volleyball and I am about to do track. Do u think if I do track i can lose some of my belly fat? I have a roll under my belly button and I have love handels in my sides. I am on a diet where i can eat no candy, no ice cream and no baked goods. I work out at the ymca once a week. What else can i do to lose the weight by the summer(or before). Thanks!