How to add a custom Code content between products in a collections page

[JillElliott]

Hi there!

Currently I'm showing my products correctly but I'd like to insert a custom content between the products (it could an image or simple text). I'm attaching an image of what I need to do:

I found a really helpful information here: https://community.shopify.com/c/shopify-design/adding-custom-content-between-products-in-a-collectio... but since I'm new in Shopify i don't undertand the following:

1. How to create a product template? Currently I see a section called: product-list.liquid Is this what I have to duplicate?
2. If not, then what is the template or section I need to duplicate in order to achieve that?
3. Let's Imagine I am able to implement the custom code. Now, How is this going to be accesible to the users? is it displayed by default on the frontpage collections?

I really appreciate any idea or suggestion to implement this. Thanks In advanced.