Writing up your resume is easy, but you need some time. You want it to look decent. You need to take to gather up your past performances and training. Even the smallest performance should be added to your resume. Any training for anything should also be added. A good plus to any resume is any special skills. It can be something like; basketball, karate, gymnastics. You also have to include your height, DOB, eye color, hair color, and details like those. With your parents permission, you can search for resume examples, and many websites will pop up to view examples.
Head-shots are professional photographs taken of your head, and sometimes your upper body. There really isn't any need to spend a fortune on your head-shots. Sometimes you can find cheap deals, and they look just as good. Unless you have been acting for a while and choose to continue, you can go for those really nice shots. Consider this before you take those shots; your change. If you have braces and know you aren't going to have them on long, then don't go expensive. You can always do that after you remove them.