The best way to learn something is explaining it to something else, and, from my personal experience, that's totally true.

Maybe the comma before "from" could also remain where it was, but that's up to you.

On the other hand, I'm pretty sure that teaching is not that enjoying for everyone, but it's something that accelerates the process considerably.

Alternatively, you could delete "but" and capitalize "it's" to make the rest of that sentence into a new one.

It's a pleasure to me bBeing helpful forto others is a pleasure for me, and I have a lot of patience when it comes to find the best way to reach the students.

The changes I made might make this sentence more succinct.

So now, I'm planning to mix up my hobby of doing small projects with my kind of passion for teaching.

I never tried to create educational content bellowfore.

It's being kind of frustrating because I thought I'd get things done more quickly.

You could also leave "being" there, if you'd like.

It turns out that I actually I have to grasp a lot more into grasp with the fundamentals of descriptive statistics in order to explain things properly.

I think I've personally seen structures like "a lot more to grasp" more often than "to grasp a lot more," but this sentence was pretty clear already.

Oh.. o.. Of course.. t.. The video is gonna be in English.

If something can stand alone as its own sentence (e.g. "Oh" and "Of course"), you can usually extend the ellipsis to four periods. I forget exactly when you need to space them out, though.

Pronunciation is a whole other world apart from what I do here.

You could also replace "world" with "ballpark" or "realm" to get the same meaning across.