I like writing.

Writing is one of my hobbies. I can put my am able to convey both my sadness in my writing or my as well as my happiness in my writing. It's a good way to express our one's feelings. People around me praise my writing. I took received advise instructions (or, "I was instructed by...") from my Arabic teacher at school about how to write an article. Maybe I will become a good writer or a journalist in the future.

Very well written and the corrections I have made are not fundamental either, however of course there are many ways of expressing one sentence and this passage could be written in several ways. 

Whilst this is brilliant, try to connect your sentences better through the use of punctuation as opposed to writing in short, unconnected sentences, so that it flows better. Additionally, you may wish to make use of adjectives and hyperbole for greater effect. And, for instance, when you make a statement (e.g. you like writing because it allows for expression of emotion), elaborate further and explain why. For example, if I were to re-write it, I might express myself thus (bearing in mind there are many ways of writing it):

"Writing is one of my fondest of hobbies for it allows me to convey my thoughts and feelings - whether they be of joy or melancholy, - and thus discharge of the internal emotions which at times can be an overwhelming oppression to my heart. Indeed, it is one of the best forms expressing one's feelings. 
When I was at school, I discovered how best to author an article under the instructions of my Arabic tutor, and perhaps I may employ this acquired ability in becoming a great writer or journalist some time in the future; after all, I find people around me are constantly praising my works!