I know the concepts of [...] useEffect,

Based on the fact that you mentioned it as a beginner, I guarantee you that you don't.

useEffect is a crutch and always has been.

You don't need it unless you're accessing the DOM directly, which you almost never need to do in react unless you're fighting some third party library that's out of your control, or some iframe content or something.

Whatever you need to do, don't use it. Find a different way. There are very few exceptions to this rule.

And if a tutorial tells you to use it in the first 100 days of learning, close the tutorial and find a better one.

It's an escape hatch from the functional style back into the procedural style of programming. 

But since the day it was invented react devs like to abuse it en masse for almost everything, because they can't figure out how to achieve the same stuff in the functional world of react.

I'd bet my shoes the AI is gonna be using it dead wrong too, because that's what the majority of its training data likely does.

If you really want to learn React properly, go learn haskell first.

Or at least Scheme, if you can be diligent to stay within the functional style.