Ditto on the previous posts.
Something else I suggest is to not be afraid to ask for help from your parents and school counselors. If you prove to them that you are serious now, then you will have no trouble planning out exactly what you need to do for the future when you are actually applying. You may even want to try and contact your local ALO to ask for their advice on the things that you can be doing now to get you prepared. Finally start building a solid resume now. Pick one or two leadership activities (Boy Scouts, CAP, JROTC, etc.), one or two sports (team sports are preferable and try to work up to a team captain or manager position, something to with leadership), and two or three volunteer activities (you can do more, but pick one or two activities to be involved with on a regular basis.)
So what it boils down to is:
-You are starting young
-You have 3 years ahead of you to prepare
-DON'T WASTE THIS TIME IF YOU ARE SERIOUS ABOUT GOING!!!!!!!!
Good luck, and I hope that you will eventually get appointed.
