Styling the Posts Page

I’m using Elementor with your theme, and so far it’s been working beautifully. However, I’m unclear about how to style the Posts page. How do I assign the Elementor Canvas Layout to the Posts page so that I can customize the design? This is the page I designed to be the blog page: https://www.cindylaifitness.com/personal-trainer/fitness-tips/. But, when I point the Blog Posts to that page, it defaults to the Bootstrap theme.

The page I need help with: [log in to see the link]