Can I Start?

Hello I am a current Junior in high school and hope to become an Army Officer. I hope to gain admission into West Point, but know that is never guaranteed. Therefore, I am also applying for ROTC Scholarships. I was looking at the Army website, and was wondering if I could go ahead and start my application for ROTC even though I am only a junior. I can't find anywhere where it says I can't, but I want to be sure.
Thanks

GO ARMY