Could i be a model for anything?

My friend said i could. I don't think so at all. Uhmm lets see im 5' 3" and im 13. I weigh about 120-130 but i look pretty thin. The only thing are my legs, which i thought were a little to muscular from horseback riding to model. Last thing - i have kinda big so idk if that would work. B cup... hehe :)