When you install the theme the default homepage design consists of the blog feed with sidebar, but you can create a page with an alternative layouts.
The layouts are: ‘Full Width Homepage (blog archive)’, ‘Grid Homepage (blog archive)’ or ‘Grid Full Width Homepage (blog archive)’ — have a look at the demo sites to see these in action).
To use one of these layouts as homepage create a new Page and under ‘Page Attributes’ select the template you wish to use and save and publish this page.
To activate this page as your homepage go to Settings > Reading and choose ‘A static page’ option for ‘Frontpage / main homepage display’. Then choose the page that will be used for your Frontpage from the dropdown.