Go to Blog post > Add blog posts
Fill Title, Content, Select featured image and Visivility and Paste Shortcode to "Content".
After, click to "Save"
Click to "View" button to see the result
Go to Pages > Add page
Fill Title, Paste shortcode to Content's box, Select Template is: "page.load_shortode"
After, Click to "Save"
Click to View button to see the result