Hopefully, unlike Calvin, you realize that mathematics is not about faith, but about conclusions rooted in proof. As a student, Calculus intrigued me because of its root in the physical world. Calculus is just a language to describe physics, so it may look a little different than previous courses. We will get some new operations, but they are rooted in the operations we use everyday: addition, subtraction, multiplication and division. Even that list can be cut in half since subtraction is the inverse for addition, and likewise for division and multiplication. So we are left with two operations: addition and multiplication, one of which is the repeated use of the other. Thus, you must add well in order to do calculus.
But, like Calvin, it took me a little more to do well in Calculus. So, browse the site since I am working on some addition.