13 yrs old and over weight. Please read?

Okay so I'm 4'11 and weigh 162.2 I know I'm overweight. First I feel like I should tell you y I want to lose weight. I'm a dancer and I'm good. But I feel like ny technique And jumps can be better if they have a lighter load to carry. Also, I want to feel more confident with my body because I know I'm pretty. This is what I've been doing so far. I am doing Seventeen Magazines 5 week Summer makeover. Also, in July, I start techinique classes with my dance team on Wednesday. Also I've been walking around my neighbor hood. Any suggestions of what I can do? What should I lose to look my best? I was thinking 30 lbs because I've noticed I've been getting taller and might be hitting a growth spurt.