"music is always there with you!" Say music has always been there for me. And without the exclamation mark.
I agree about using 1st person perspective instead of 2nd,. It seems preachy when people write "you."
I also agree with Julia about not using the exclamation point in formal writing, but I wish I did not!!!!!! I like exclamation points, and I think they play a cool role in writing. Unfortunately, some AO readers might be among those who frown on the use of them in formal writing, so you maybe should not use them, But I would use them, even at the risk of seeming informal!!
Whenever I think about my childhood, I always---it is redundant. Either use whenever or always, but not both.
Your first 2 sentences are beautiful!
One day my grandmother was looking me and my sister but in my hometown electricity used to shut off was typical thing. --this is full of errors.
One day, my grandmother was looking after me sister and me in my hometown, where it was typical to have the electricity shut off on occasion.
From that moment I
understand understood that however it is sad or black the day I could give people joy through my song. ---end the paragraph here.
New paragraph:
When I was in elementary school I had a chance to sing ...
I'll change the verb to the past tense:
In order to get better grade at that class, I needed to do some extra credit.
...the best singer of my high school. (end the paragraph and start a new one here.)
Since I came here in United States I attended a charity
donation concert
to involving Mongolia in order to help herders who are having hard time in winter.
:-)