A girl's dream....

There is a girl who wants to be a designer, and she thinks believes she could be a designer become one. Because she knows clothes, she is good at putting together outfits. Sometimes she buys things before they are even in a style. She thinks she is different. But she has to know that if she wants to be a designer, she will not only need to go she has to go to fashion school to learn how to draw and how to sew, but will also has need to work very hard to become a (successful) designer. It is a long journey.

There is an issue of parallelism in the original wording of the sentence.
"she has to go to fashion school to learn how to draw, (to learn) how to sew, she has to work very hard to become a designer" 
The green portion should have the same structure as the previous verbs to make the sentence flow better. I couldn't figure out a way to do exactly that, so I took the freedom to change the wording a bit. 

Anywhere the best wishes to her. Hope her dream will become a truth.
Anyway, I hope her the best. I hope her dream will come true.

Hope that helps,
-Adw