Y'all, be a little kind to this person: she has admitted she is just a kid. I am willing to bet many of us weren't this driven as 15 year olds. Understand that if she is asking young inexperienced questions it's BECAUSE SHE IS YOUNG AND INEXPERIENCED.
Best of luck, OP! Take the next few days and familiarize yourself with the various boards. Try to understand as much as you can absorb and feel free to ask questions when you don't feel like you can find the answers.
I agree with others- over the next 3 years, challenge yourself as MUCH as you possibly can! Foster a love for people and become a natural leader. This entire process is a marathon, not a sprint- I feel like you are starting to stretch now! You go, kid! I'll be pulling for you!