Good-Person
Captain Junkie
In order to develop your writing skill, yo need to have a good understanding of the language you want to use for your writing. Once, you have mastered the language, you should practice writing.
I have practised to write a lot in the past. My work used to be full of grammatical errors. However, by the passage of time, I learned English language and tried to make myself better. I still struggle till this day. However, things are still pretty much better now. The main thing is practise and trying to master English grammar.