Add a Custom Page of Collection on The Minimal Theme in Shopify 

Customize a Page of Collections in Shopify by Creating a Custom Page Template and a Custom Section. 

page.my-custom-page.liquid

Copy the 1 line of code in blue for page template.

{% section 'my-custom-page' %}

This Video Tutorial shows customization of the Shopify Debut Theme allows you to add custom content on a page using the sections feature.

This Article contains the code blocks need for this theme customization seen in the video:

Page Template Code

page.my-custom-collections.liquid

{% section 'my-custom-collections' %}