Use premade templates to create your story or you can create your own.
Do not copy paste your content from other websites. Write a unique and trending content.
Use crisp and clear images. Don't overuse text. Keep text below 280 characters per page.
Keep your Title below 90 characters and Description below 70 characters.
Do not over animate the page. Keep animation simple and subtle.
Do proper SEO. Submit the sitemap of Web Story in Google Search Console.