You can easily edit in HTML in Canvas to build your site if you have some basic HTML skills to add interactivity into your Canvas course. Using HTML will allow you to do things like embed videos or Google slides, or add tabs to your site as a way to organize content for students. If you are interested in learning some basic HTML to help-set up your Canvas site, check out this public Canvas site built by Curt Pavia in Western Libraries:
For assistance with Canvas, see: Canvas Help at WWU.