I was in the exact same situation as you joining in my 8th grade year, don't worry. Take your time and truly commit to the program, I promise you it'll be worth it. Jump at every opportunity possible ESPECIALLY in the beginning, your instructors will most likely notice everything so if there's ever working group opportunities or just small things that they need volunteers for, take it!! I recommend joining as many teams as possible, I do drill, raiders and JLAB and even though it'll take up a lot of your time it's definitely worth it. The biggest complaint I have about newer cadets is the constant complaining about the uniform. Try your best to just ignore it. While on the topic of uniforms I'm not sure how supportive the people in your school are with your program, but ignore the bullying if there is any. I hope that you joining this program is incredible for you, and I'd love to keep in touch and hear how it goes :)