My point is that you should know exactly the process that the NA and each of the nominating authorities employs and follow that to the letter. If they say, submit a 5x7 photograph, you'd be wise not to submit a 4x6 one. My 2/C made a list of what was required and the deadline for each. She checked off the items as they were compiled to ensure that nothing was omitted.
You're getting a early start - that's great. There's plenty of time to learn the processes. One thing you can do even before you're able to apply is impress your 11th grade math and English teachers. Their reply to the NA is mandatory and I suspect carries more weight than might be obvious.
Good luck.