Reseach on "How To become A Model or a Ballerina"

I am going to do two leaflets on how one would become a model or a ballerina, my first decision is to research into both industries looking at how one could be a model or a ballerina. I am going to pick 6 questions and answer them in detail, also i will find the what a model/ ballerina diet and size/height would have to be.
The reason for this decision is because it wont be all the good sides of it it will be the bad. Investigating into depth how one would become a model, but the truth. It will be a harsh but truthful leaflet on how models are picked to be models- and what happens after they become a model.