Edit Blog, Shop and Archive pages
Tutorials for WPKoi Themes
Blog setup with customizer
If You want to edit the blog, shop or other archive pages, go to customizer first.
Basically You can't edit these pages with Elementor! They have different structure. Elementor Pro or another third party plugin could solve this. Or You can build a page with Elementor and use that as blog page.
Go to the customizer (Appearance-> Customize menu) to edit blog or shop pages.
Most functions are at the Layout-> Blog and Layout-> WooCommerce section. The premium version of the themes have much more options, but You can find some with the free versions also.
With the most themes You can edit the blog header here.
You can change the sidebar layout at Layout-> Sidebars section.