One of the upcoming trends are themes with Page Builders that are either built into the theme or use a plugin. A page builder is a feature that allows the user to create various page layouts simply by a drag and drop method. In a sense, what you are building is a page with widgets. No content is added like you would with a normal page or post when using the editor. For Circumference, it does not include a page builder coded into it, but does provide you with a blank page template named: Page Builder
Choosing a page builder plugin is something you will need to sit down with a coffee and explore what choices you have by searching Google for “WordPress Page Builder Plugins” and see what comes up. One in particular will be the Page Builder plugin by SiteOrigin and appears to be a popular (free) option. Basically you have the choice of free ones and paid ones.