This is Elias from Shopify Support. I'd be happy to lend a hand with this!
Depending on your theme, you can use other sections, such as the Slideshow or Image with text, to add images to your homepage. As an example, the Debut theme comes with the Gallery, Image with text, Image with text overlay, Slideshow, and Image slider sections that can help showcase your pictures in different ways.
Here's a screenshot of the available sections in the Debut theme:
If you don't want to show the Featured collections, you can also remove this section from your homepage.
I'd love to know if this is what you're looking for? Also, which theme are you using at the moment?