How important is calculus for pure math prep?

I’m a freshman planning on doubling in math and physics, and considering grad school.

Currently taking calc 2 and am unsure how hard I should push myself beyond what’s needed to do well in the class to set myself up for success in advanced math down the road.

Would my time be better spent doing difficult problems within calc 2 beyond what the prof requires, or reading cool pure math stuff?

Thanks!

Author: PossibleEasy6822