@Vasap - is calculus hard? To some - very. To some, it looks like a foreign language they cannot speak. You asked so I'll keep it real with you on your concern here. There are indeed national scholarship winners who scrub out of their scholarship for many reasons, including some Navy-option scholarship participants who bottom line do not pass these 4 courses (2 calc, 2 physics) in the timeframes despite best efforts - multiple attempts - it happens. Calc II for someone struggling in Math is tough. My DS has classmates who are otherwise rock stars in the program and yet are scrubbing out as these deadlines approach. The pressure they are under is intense. It's sad. Free advice - I would try to get through at least Calc I and Physics I before day one of your second year including a summer retake if needed. Because if you cannot say get this foundation under your belt by then, you can take a free year on scholarship and then walk/ not owe moneys back. Or you can keep trying but know if you fall short after that date you may owe the entire scholarship back.
I agree as another poster above notes there is support to get through it and that many find this challenging but get through it/ overcome it. Tutors, find out which professors may have the best results and helped other people to pass, etc. Also, you can take these courses at any college also with an NROTC program over the summers if you need to isolate your focus say from your hometown. You can also take these courses in lighter course loads otherwise to ensure you time to get through them.
Constructive encouragement and pep is great but at the end of the day you should go in eyes-open to the reality that this is hard, and the program cannot only do so much to help you pass. *Well, unless you go USMA - there all rules flew out the window apparently - fyi last year, 51+ West Pointers, mostly plebes, almost got away with cheating their way through Calc I last year before getting caught and bringing disgrace to that program and themselves that will go into the annals of history as a tarnished legacy. Many will repeat their plebe year if they continue. And somehow most still have the option to graduate - so much for a code of honor standard. But I digress.
You either will climb these 4 hills of calc and physics, or you will not. And some great people/ talented, smart, and otherwise nearly perfect people - cannot or do not. Take the steps you need and be resolved to get through it. These are but 4 of the many check-gates you have to get through to make it to commission and serve as an officer. As you'll see this summer, some of your fellow national scholarship winners won't even make it through NSI. Others won't activate their scholarship when they can't meet the physical standards. The group will shrink until commission, unfortunately.
Best of luck.