United States Military Academy?

So I am a Junior in High School and am interested in applying to one of the major military academy. I've been focusing more towards the United States Air Force Academy. I am really stressed, with all these requirements. I am applying to the 2012 Summer Seminar, but I did pretty bad on my SAT, what do you guys recommend? Please no rude comments.

Grades (Current):

AP English 11: B

AP U.S. History: A-

Accounting: A-

German 2: A (note: I didn't fail German in the previous years, I didn't take it Freshman year)

Algebra 2: A-

Chemistry: B

Sports:

1. Freshman Year: C-Team (All Freshmen Team)

1. Sophomore Year: Varsity Football (Varsity Letter)

2. Junior Year: Varsity Football (Varsity Letter)

Junior Year: (Planning on participating in Track & Field)

Clubs:

National Honor Society (1 year and counting)

Volunteer:

1. Seattle/Tacoma Milal Organization (Every Saturday I volunteer to take care of physically/mentally disabled kids/adults). [Over 600 Hours]

2. American Red Cross on Ft. Lewis (I do this only over the summer because I have almost no time during school. Plus, Ft. Lewis is almost 20 miles away so it's hard for me to drive there everyday.

Leadership Role:

I am the group leader for one of the five groups in Milal. (I watch over the other volunteers and make sure they are doing what they should be).

SAT:

This is the first SAT I have ever taken. It was taken on December 3, 2011.

Reading: 510

Math: 550

Writing: 470

Essay: 6

Total: 1530---I know I did horrible, I actually did better on my PSAT. Honestly I hardly studied and now I see the harsh reality of it, I am going to study my *** off and take the next SAT in 50 days, and will be taking the ACT about a month after that.

P.S. I heard the ACT was a little easier than the SAT, if you have any experience with the ACT could you please provide some info :)