I'm 13 years old, and I'm on the chubby side. My stomach sticks out, and I feel uncomfortable in a t-shirt or bathing suit. Then my thighs, like from my waist to my knees are fat. They are... like chubby? I guess.

Lately, I've been speed walking around 2 miles a night.

What are tips to making me have a flatter stomach and skinnier thighs? Workout & Eating tips. Thanks in advance!