Aaron comes with the following templates:
The Landing page template only shows your header, it does not display your footer, your featured content, post content or page content. Your header image will display as a fullscreen image.
The Header & Footer page template only shows your header and footer, it does not display your featured content, post content or page content. It will display the footer widget area, but not the sidebar.
The Static and Featured page template will display the content of the selected page together with your featured content. You also need to active the Jetpack module for Featured Content.
The Grid page template shows your posts in a responsive masonry grid. It does not display the sidebar.
The No sidebar page template shows your page content, but it does not display the sidebar.
To use a custom page template, create a new page and select the template under Page Attributes.
If you want to use the template for your front page, then set your new page as your static front page in the customizer or under Settings > Reading.