Relearn demo has some customizations for buttons (to make them 3d style), if you want to remove this customization, go to theme options — general — custom css and remove everything from field.
All other settings are regular for theme. Here you can find few videos with details how to configure theme for your needs.
Here is video about niche sites. It’s described as for game site, but all details are the same for any niche site including Learning course niche
Here is also another video which is only for woocommerce settings
Learning site demo can be used as affiliate shop, shop for selling digital products and as full Learning course site (when you teach something directly on your site). For Learning course system, you will need additional plugin Tutor LMS, plugin is not included in theme. Free and pro versions of plugin are available. You can find details on Tutor LMS site
We also made demo with Tutor LMS, you can find how it works with theme on our Learning Course demo site