This theme will install directly over the elemental theme install. If you are starting with this or a bare install here are a few things to do.
First you may want to use the mobile navigation built into this theme. There is a custom template called "Slicknav" that will show on small screens. Activating this will hide the desktop regular nav on small screens. You may not need this if you dont have a ton of top level pages. Its up to you.
There are currently two blocks with custom templates: the core image block and the random image block, which I love. Your page list with thumbnails showing is also styled with the "solo exhibition fancy box" styling.