Nick,
When I was your age, I wanted to be a cinematographer as well. I read the American Cinematographer magazine and anything on film. I spent a very short time in LA, then life took me in another direction (of which I am very happy with). Nevertheless, I encourage you to make films and put them on YOUTUBE, finish High School, go to college (USC, UCLA, or some other reputable film school). Live in LA or NYC and become a production assistant, or apprentice under a DP you admire. Network with everyone you can in the film industry. Study films you love. Watch them over and over. And, ask questions on cinematography.com. This community is wise and generous. I wish you the very best. Gary