First explainer I've ever seen of Taylor series that really clicked for me.

https://www.youtube.com/watch?v=3d6DsjIBzJ4

In general, I wish more of calculus had been taught to me not as a fundmental math that is abstractly internally-consistent, but from its historical origins: "Physics and engineering are hard, here's some brilliant hacks people came up with to make the estimates and calculations tractable." Then you can go from those to why they work to get to the theoretical context-free calculus.