Is my gramar right?

i've learned english since primary school. Now I'm a college student. I ought to have good english skill. I want to write story or articles in English but I'm not confident. What do you think about my grammar? Where should I learn English? I have no money to get English course.

Oh.. I want to tell you that there is a english-indonesia,indonesia-english dictionary website at sederet.com. really helpful. You dont have to open dictionary book in front of you computer.

Ester,

You have excellent English. Writing and article/story and telling story verbally can be very different. Just like speaking Indonesian and/or writing Indonesian can be very tricky. If you like writing in Indonesian and wanted to do the same with English, I don’t think is become a problem.
Get more vocabulary; write it in your own style. Make sure the reader understand what you are going to tell. My grammar it is not perfect either, but I keen to learn and always trying to improve everyday.
I am more verbally than literature

Good luck!

any progress with your book/story writing? Would love to read it sometimes

The bold part should be "an".