I have big cankles, calves and thighs, what to do?

Hi, I have big cankles, calves and thighs, I have a skinny upper body, so my stomach is really flat. I'm 15, im around 123 pounds, 5'6, do I have to go on a diet or change something, is my body normal, what to do?

If you go to the gym only work on your lower body and not your upper. I don't think going on a diet will help thats just the way your made, so just work your lower body.

You're like just like me - we have seriously from the way you described yourself the exact bodyshape as me , and were the same age
Well, if I'm not mistaken you have a lot of muscle on your legs, and not so much fat
So what you want to do is run- RUN a lot
In that way you burn of the fat you have, and dont build muscle.
By doing weights you build muscles - and thats exactly the opposite you want to do if you want slender legs.
Yoga is a good possibility too - because it does cardio, but stretches at the same time, and in that way you burn fat and build SLENDER muscles, and not bulky ones

and yes you're body is completely normal.

You seem normal and not over wt. At 5' 6 you should weigh 130# so you are fine. You can't change your genetic makeup cankles, ankles or thighs be sure to eat right and exercise