I am a writer

I tried to write this essay to submit on coursera.org. The class I am taking is "English Composition 1."
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I am not a writer. It was not my profession, and now, as a stay-home mom, I am not a writer at all. But I have to write. I write in my Vietnamese for my baby's blog, telling about her events so that my mother living in another hemispheres can know about her grand-daughter. I sometimes write something not important on my facebook notes to let my thoughts out of my brain, in Vietnamese too. So, I am an amateur writer in my mother tongue. However, I want to write to communicate with my foreign friends, who usually see my writing awkward.
I am from Vietnam. I was educated to become a teacher of English in high schools. Then I studied Master of TESOL to teach English in colleges. I should have been a teacher if I had not followed my husband to the U.S. He is studying for Ph.D while I become a stay-home mom with a brains always filling up with so many questions. Sacrifice or not sacrifice? Family or Work? My baby or my career? 3 years staying home because my visa status does not allow me to study higher or work, even part-time. Therefore, writing is my relieving solution.
But I used to writing in my mother tongue, I wrote well when I was in high school. In my country, students depend on sample essays to learn more beautifully-written phrases to write well. However, I didn't follow that. I read a lot instead. Regretfully, I didn't do the same when I learned to write English essays in college. I still read Vietnamese novels then and felt it hard to digest the thinnest English novel in the library. Another reason is I didn't practice writing much. That's why I am not a good writer in English.
I am trying to correct that mistake by learning to write in English again. 3 years staying home with my baby, I have chance to read materials about parenting and children books. Still, American people find my writing "awkward", the word they describe my writing. I am also worried about grammar mistakes. From my language background, I am not used to using articles, prepositions and tense. That's the reason why I enroll this class with the hope to be helped from others.