keep up the good work. Start talking to your high school counselors about the AFA. They are the ones you will need to get what you need done. If they dont know they can get the right people who know what needs to get done for you. Keep focused on your school and let the counselors do their thing. Let them know from time to time about any progress to your inquiry about the AFA.
I had a friend back in high school get accepted in the AFA. He was busy during his Senior Year but nothing he couldnt handle. I believe to enter the AFA, West Point, or the Naval Academy(?), you will need to be sponsored by your local congressman. (that process i have no idea about but if i recall correctly, your high school counselors can get the ball rolling for that). The Standards are intimidating yes but achievable by anyone wanting to enter the AFA.
As stated above try to get involved with your community. I'm sure you will know what needs to get done when the time comes. Community service will follow you throughout your career as a person serving the Military.
good luck to you.