In your site click on Dashboard → Pages → Add new. Title your new page "Home" or "Front page". Then go to Settings → Reading and choose your new "home" page in the menu. Modify your "home" page and select "homepage" in the template selection.
Go back to your new "home" page and select on the right sidebar the "homepage" template. This is mandatory if you want to show the big search bar on top of the hero image.