Yeah youll need a portfolio which could represent an investment of several hundred dollars or more. Once you have a portfolio you should send them out to modeling agencies. I would suggest you stick to the upscale agencies like Ford for example. This business has more sleazeballs than legit agents. You should stick with the legit ones. And makse sure you have a parent or guardian with you to look after your interests and don't let the clients bully you into doing something you might regret later. JUst becareful it is a rough business full of sleazes liars and cheats. But it can also be a great way to make a decent living. Just be careful and play your cards right.