Hello there,

Thanks for using our theme. Your homepage is a Post Page by default, if you want to set your homepage just like on the demo site, please follow our instructions on the video:
http://support.themely.com/knowledgebase/video-create-viral-news-wordpress-site-novapress-pro-theme/

I hope the above is useful to you.

Best wishes,
Piotr Bąk