If you're learning English and you think your English isn't perfect, you're not alone!
Some Native English speakers make mistakes too, as do people in (I think) any language.

These are a few common mistakes made by Native English speakers

Use (youz/yous):
It actually means YOU (plural). Some people mean to say YOUS. But some people even type USE!
✅Correct: You

I could care less:
If someone wants to say: I really don't care, they can use this sentence. But some Native speakers accidentally say COULD instead of COULDN'T.
✅Correct: I couldn't care less = I really don't care. It's not important to me.

I've saw it:
Now we know that with HAVR or HAS, we should use the Past Participle form of the verb. But some Native speakers use the HAVE or HAS with the Past Simple form of the verb.
✅Correct: I've seen it.

So, please don't be too hard on yourself. You're on this journey of learning English. You will definitely make mistakes, but so does everyone, even Native speakers.