Correct me if you´d like it, thank you.

It sounds natural to say "if you'd like," but if you were to have something after it, use "to" instead "it" because the full sentence is "if you would like to do so/it."

Hello, I hope you are having a good day,.

Make sure to use periods (.) to end sentences.

wWell, today wais special, beacause the school day was canceled becausedue to the cquality of the air, t. There is a fire on the hill and the trees are dying more frecquently,. I think that the ambient is soreally bad tofor practiceing a sport or doing something outside,.

"today is special" I changed it to present tense because the day, right now, is special. "school" and "really bad" sound more natural than "the school day" and "so bad." Also instead of repeating because twice, you could say due.
"Bad to practice" I changed it to "bad for practicing" since the "to" in the sentence it would mean that the ambient is the thing that is bad because of practicing a sport or doing something outside.

I don´t have any idea why is there is a fire on the hill, but i think it's cause fromd by people who are not conciscious,.

Hello, I hope you are having a good day,.

well, tToday was special, beacause the school day was canceled becausedue to the cquality of the air, t. There is a fire on the hill and the trees are dying more frecquently,. I think that the ambient is so badir quality makes it too hard (difficult) to practice a sport or do somethings outside,.

It is OK to start a sentence with "well" when speaking aloud, but it's done very rarely in written sentences.

"because" = "due to" but the cause-result structure here makes "due to" more natural.

I don´t't have any idea why is there a fire on the hill, but iI think it was cause fromd by people who awere not concicious,being careful.