Custom Template not applying

I am trying to create a new custom template for my Learndash site, I am using the Astra theme, with Elementor page builder. I create a custom template and style it within Elementor, then go to my courses and apply the template, but when I view the course it is using the default template. My site is on WP 5.1.1 with the Astra child them and latest Elementor. My main thing i want to do is have all of the courses and lessons look like the rest of my site with a left hand menu (not in the sidebar).