Surphe – memorization isn’t going to get you through calc and chemistry, and it won’t help you all with more difficult courses. How did you end up with a computer engineering major? (Assuming that is your major, from your earlier post in another thread).
You won’t do well with any sort of engineering track if memorization is your basic strategy – sooner or later you are going to be presented with assignments that expect you to apply your conceptual understanding to new problems or projects.
I’m guessing that you either chose your major because of parental pressure or else because you perceive job and earning prospects to be better with an engineering major – but the problem is, the job/earning numbers reflect the outcomes from successful students who have a knack for math and engineering.
I think it’s time for you to sit down and browse through the offerings at CCNY – you are lucky, CCNY offers a lot to choose from! And it is much better for you to change majors now, during your first year, when there is still plenty of time to catch up with any prerequisites for different majors.