HOW EXACTLY DO YOU BECOME A K-POP TRAINEE AND WHAT IS LIFE LIKE AS A TRAINEE?

Hi, I'm currently writing a book about a girl who wants to become a K-Pop trainee and later an idol. However, I would need to know what life is like as a trainee and how one even becomes one. I would particularly appreciate information about JYP and Starship, as they would be best suited for…