I think the goal of getting published is good, but if this story is a sample, you have a long way to go.
However, plenty of reading, for example, some of the mainstream authors who write in English, is good advice. If you are aware of how they write, you will know why they are getting published. In the meantime, concentrate on writing for competitions which you can find online. These will give you deadlines you can work to.
After years of writing, I decided to do four university courses, partly to be reminded of the basics and to study the elements of good writing. I learned a lot, mainly to be more patient with my writing, to redraft, often many times, until I was happy with the result. In my opinion, the first draft just gets the ideas down, but it is not always the best version for others to read and enjoy.
I also suggest you read 'The Right To Write' by Julia Cameron. She lets you see how writing can not only just be a hobby, but an everyday action and a way of life.
J