Sorry for not noticing this message! I barely check messages, so ya.
To start off, I'm a horrible advice giver btw. Really, I just combine my experience of writing from school to write stories. Also, rich vocabulary is also good. Make sure that your story has the proper quotations where they need to be, capitalized letters where they should be, and make sure there's no run on sentences. Read over your story so it makes sense and doesn't sound confusing. And commas are important too. So ya.
Sorry if this sounds horrible.
:)