Cant add a section to my page- 7.0 Avenue Template

Site URL: https://www.allegragonzalezabreu.com/

I would like to add sections to some of my pages so I can target those sections and change background colors of parts of my page and things like that. For some reason at the bottom of the list of my pages, I only see the option to add a page, not a section. I've uploaded a screenshot that shows what I see. Thanks!

You add blocks (sections) to the pages themselves, text or image, or gallery blocks,  so to add a section to a page edit the page by clicking on the title of it, then choose edit page content then you add sections by clicking the tear dot and choosing a block from the menu. It will take code to change the color of a specific block. 

You add blocks (sections) to the pages themselves, text or image, or gallery blocks,  so to add a section to a page edit the page by clicking on the title of it, then choose edit page content then you add sections by clicking the tear dot and choosing a block from the menu. It will take code to change the color of a specific block. 

Take a look at this:

https://www.usingmyhead.com/squarespace/avenue-squarespace-template-analysis