This is how a single story would look like.
You break up your paragraphs with <p> at the start of a paragraph and </p> at the end of a paragraph. If you want something bold, wrap it in <strong> and </strong>. If you want something italicised, wrap it in <em> and </em>.
If you want to have a break in your story, you can do this easily by putting <p> </p> in between the sections, like below.
If your story is in multiple sections, and you want to have a header above each section, wrap the header in <h4> and </h4>, like above.
With these items, most things in a single story are sorted.