I was in the same boat as you last year and I got an appointment this year. My tip for you is to show admissions that you can excel in college with a challenging course load (calc, physics, chem) and also while fully participating in ROTC (and maybe something else). I'd also get in contact with your local liaison a little before the start of the fall semester and explain your goals and how you aim to achieve them. If you convince him that you have the drive, and the results at the end of the semester are good, then he will most likely talk highly of you to the admissions people or the regional liaison.
Other good people to talk to are your ROTC cadre because an NCO cadre will administer the CFA and the CO will give the interview which could lead to you getting a ROTC nomination. However, I wouldn't walk in day one and say your West Point goals because they will not care as they don't know you. Give it a month, or at least until you demonstrate yourself as a serious cadet, before you bring up West Point to the cadre.
Lastly, enjoy college. I did. Go out and meet people. Maybe you will learn that this is where you want to be and that's perfectly fine. More than one way to become an officer.