The gGirl wWho nNever mMade a mMistake

This is a simple thing; it isn’t that important to do this correction.

TOnce upon a time, there was a girl that didn't have courage to do anything, because she used to listen compliments andwas afraid to make a mistake. Even though people said that she is talented, but she coulshe still didn'’t sleep well and she wasn't happyhave courage. Since she was so inexperienced, one day she made her firsta mistake, she was shocked but she laughed and i. It was her first time to feeling comfortable, then, she started to try everything and doidn't care about what happened, she hav. She now ahas courage to be herself and stopped pretending that she is incredibleperfect.

I basically just made it more readable and changed to run-on sentence to a bunch of other sentences.

The gGirl who nNever mMade a mMistake

Remember to capitalize titles to those which apply. [ except: articles, prepositions... ]

There was a girl thatwho didn't have courage to do anything, because she used to listen to compliments and people said that she is talented, but s. She couldn't sleep well and she wasn't happy, o. One day, she made her first mistake, s. She was shocked but she laughed and i. It was her first time to feel comfortable, s. She started to try everything and she didon't care about what happened, she hav. She now ahad courage to be herself and she stopped pretending that she iso be incredible. (or maybe another word, e.g. "perfect")

You must divide your phrases make them into sentences because it is becoming too long.
Only make full sentences of phrase/clauses that have the same idea.

When there is a new "subject" [ e.g. "she, I, he, they, (name)" ]. Try to make a new sentence.

* I used "who" because "girl" is a person.

The gGirl wWho nNever mMade a mMistake

Title capitalization rules

TOnce, there was a girl that didn't have the courage to do anything, because she used to listen. She used to receive a lot of compliments, and people said that she iwas talented, but. However, she couldn't sleep well and she wasn't happy, o. One day, she made her first mistake, s. She was shocked, but sit made her laughed and it was her first time to feeling comfortable. After this, she started to try everanything and don'she wanted and without careing about what happened, she have now a. This gave her the courage to be herself and to stopped pretending that she is incrediblewas perfect.

When beginning a story as you are doing here, we often introduce it with "Once," For example the classic from fairy tales, "Once upon a time..."

This needs to be broken up, it can't exist as one long sentence.