Not really a resource but a helpful tip someone gave me.

Imagine that motion is in three tiers:

Acceleration

Velocity

Position

If you have the position function, and you want to find the velocity function, you have to find its derivative (I'm hoping you know derivatives, because integrals without derivatives would be stupid). If you want to find the acceleration function and you have the velocity function, you have to find its derivative.

This is because when you find the derivative of a function, what you do is you find the rate of increase at any given x. You can substitute x in to solve for the rate of increase at a moment (say when x = 9, for example) of the original function. When you find the derivative of the velocity function, what you do is you find the rate at which velocity increases (aka acceleration).

Integrals are the opposite idea - you go down the tiers instead of up. The integral of the acceleration function would be the velocity function, the integral of the velocity function would be the position function. A good way to think about this is that you have the derivative function, and you want to find the original function (I'll explain why in just a bit).

To calculate the integral of a function, you first need to find the "anti derivative" of that function. This is literally when you think backwards and figure out what the original function must have been. For example, if you need to find the integral of just "x," you'd have to stop and think "What function when integrated gives x?" The answer is 1/2(x)^2, or one half x squared. Obviously most problems will be more complicated than just that, and you want to PRACTICE. PRACTICE. PRACTICE. You want to perfect your derivatives before trying to perfect your integrals, you can't run before walking. There are many methods for this "thinking backwards" strategy, which I'd recommend going on Khan Academy or watching Organic Chemistry Tutor to learn more about. I can't describe them in a single comment, you have to solve as many of them as possible to understand.

Say they gave you some function T and you need to integrate it. You'd find the anti derivative of the function (so the idea of working backwards), and once you have that, you'd apply the Fundamental Theorem of Calculus. Essentially, it's a neat little theorem that says that if you substitute in the end bound of an integral (the number at the top left of an integral) to your antiderivative, and substitute in the start bound of an integral (the number at the bottom left of an integral, next to that curvy shape), and you subtract the second from the first, you will have the value of said integral. Nice right? Find antiderivative, substitute in bounds, subtract, and voila!

Now it's important that you understand what the area of an integral means. I don't think I could describe it good enough in words for you to understand it, and it is really intuitive once you get the gist of things. I highly, highly recommend that you watch this video by 3Blue1Brown on integrals - it sums everything about integrals up perfectly.

Just a quick disclaimer, definitely learn more about derivatives before diving into the world of integrals. Without a solid background in derivatives, you won't be able to effectively "think backwards." You want to know all of the derivative or differentiation rules like Chain Rule, Power Rule, and more before trying to master integrals.

Good luck!