Hello gavstero,
Thank you so much for using our theme Education Base. Every theme have the different approach of development. Education Base is developed based on Parent/Child Page, Widgets and customizer. You can first know about how it works. Please follow the documentation, Blog post and the theme functionality. If you are familiar with the theme features first, you can make the multiple layout of your site easily.
Let us know, if you have any confusion.
Regards