Since you mentioned you are a freshman in h.s., it is way to early to worry about whether or not you might get an appointment to an Academy. Enjoy your time in high school. Do things you: 1) Enjoy, 2) Think you can excel at or 3) Can contribute to your school due to your skills and abilities because you want to do them, not because you think it will look good on your college application. One day you may apply to an academy or your interests in the next 4 years might change. If you are able to excel at the things you do, you will be much better off in the long run regardless of where you eventually go to college.