I always want to change my hairstyle,
我总是想改变我的发型,

because I want to look as my idol's image, 
因为我想要看起来像我偶像的形象,

but i don's have the courage to do it. 
但是我没有勇气去做。

At last, my friend gives me the courage, 
最后,我的朋友给了我勇气,

she tells me that I should try
她告诉我,我应该试着去做，

and not to have regret at the young age. 
不要在年轻的时候留下遗憾。

I agree, I am so happy about my new hairstyle,
我同意她的说法,我很满意我的新发型,

it brings me the new mood. 
它给我带来了新的心情。

Trying the new things is good.
尝试新事物是好的。