Hello, I'm a Caltech grad from 40 years ago and want to re-learn calculus (I forgot most of it). I'd like to use Mathematica or another Wolfram product (if helpful) to develop calculus intuition through plotting and testing different functions and equations. I also want homework help when necessary or for checking work, and I may get into tutoring some relatives in Calculus and would want to do the same things for them (high school students in AP Calculus next year).

What Wolfram products would be most helpful? I got a subscription to Mathematic for 2024 but ended up not getting far enough into my review of precalculus to start calculus and may not get to it until next summer. I also understand there are products for homework help and maybe that would be all I need.