Being biased here as I'm a physics major, but you won't really get a better understanding of the world through just an intro to calculus course. The real understanding of things comes with applying that math to physical systems (at least, for me it did/still does). If you take calc1/2/3 (3 is usually calculus in three dimensions, 1 is an intro to integrals and derivatives, 2 is usually special techniques and series), you'll probably want something to apply it to. If you want to take it just as an elective or something, and you enjoy math, you'll probably enjoy it, but you won't really get anything useful out of it unless you take it further.