How to have the main landing page of of a store show images of categories instead of all products within the categories.

I think it is possible.

Add the following to Store Settings > Advanced > Page Header Code Injection for the store page.

<style>

  /* this ruleset is not active in SS Preview. to test it use private browsing
     < https://bit.ly/3f6lhq2 > */
  
  body:not( .sqs-edit-mode ) .products.collection-content-wrapper .list-grid {
  
    display : none;
    
    }
    
  </style>

This is for v7.1.

Add a page section to your store page and use blocks to make the section look the way you want.

Let us know how it goes.

This worked perfectly!! Thank you--I appreciate it so much!