+1 to
@AROTC-dad. Focus on what you can control: taking the hardest classes your school has to offer, getting great grades, making leadership impact, playing varsity sports, getting to know your teachers, training for the CFA.
To say that you should not worry about R-Day or A-Day is a spectacular understatement. Worry about it after you receive offer of appointment.
Finally, try to empathize with your parents and understand their resistance. As an adult — eventually — the decision to attend USMA is yours alone. But academy and military life is hard enough that you’ll want their support, if you can get it. Best wishes.