Usually,

Hello [이름]!

Thank you for doing your homework. :)

I understand that English could be really difficult.

But it only takes faith and confidence in yourself to perfect it.

You are a smart person and I know that with constant practice you will do great… ^_^

Xoxo,

T. Christina ^^

Here are my corrections for you:

i get angry when it doesn’t work out my way. 

>> I get angry when things don\'t work out the way I want them to.

And back then, i blame myself. 

>> Back then, I blame myself for it.

From now on, i will don’t blame myself and i will try to be better than before me.

>> From now on, I will no longer blame myself and I will try to be a better me instead.