Since you're in high school, take machine shop and learn how to sharpen a bit, resharpen drills, chisels, lathe operations and precision machining. If there's a mill, learn that too. All these things will serve you well as a gunsmith. Learn how to write a resume and to conduct yourself in a job interview. When you hit 18, take some NRA summer gunsmithing classes at Trinidad. Take the basic gunsmithing, metal finishing and gun repair. Do a lot of reading too. Read Stuart Otteson's The Bolt Action Rifle, Vol 1-2, W. H. B. Smith's Small Arms of the World, Steve's Pages (website), P. O. Ackley's books on hand loading, Hatcher's Notebook, W. W. Greener's The Gun and Its Development.
After high school, Move to CO and establish your residency (for cheaper tuition). Then go to Trinidad. It's the best gunsmithing school in the nation. It's not easy to get admitted as it is a very competitive process. Remember that stuff about resume and interview skills? You need them to get in.
Once you're in, keep your mouth shut and your mind open. You will learn a lot more that way. An empty glass can be fully filled by the master and a half filled glass only filled halfway by the master.
During your fourth and last semester, Attend the job fair for gunsmiths. Go to the SHOT show and the custom gunmakers guild show both years you are at Trinidad (dress clean, be well groomed, neat. You are on parade and will be making impressions on potential employers). Don't drink at any show. Make an arse of yourself before a potential employer and you'll never be hired. You are attending to network. Also, stay off social websites like Facebook. These are used by schools and employers to learn more about applicants.
One last thing. You're probably a good kid who has his act together. No fighting if it can be avoided at all. That can be the legal kiss of death for anyone who wants to be around guns. There is a trend to keep people deemed "violent" disarmed.