Adding stories on your Shopify home page is very easy, navigate to "Online Store", "Themes" and then click on "Customize" on your live theme. You should see your Theme Editor screen.
In there, click on the "Add section" button in the lower left corner, and choose "Featured Stories Carousel"
After the section is added, you can configure it and "Save" your theme.
Now, you have stories on your store, congratulations.