Comments by visitors

Hey guys! I’m running WordPress 4.5.3 on a localhost. I have installed “Layers WP” theme and I created a “One Pager”, which is basically a single page website that should work as a “business card”, no extra pages or anything, just the “Home” page. Now what I need is to make it possible for the visitors to post comments. Is there a way to do that? I searched in the settings and for “Discussion” I have enabled most of the options. In the “Screen Options” I have checked “Discussion”.. How to add this feature?

Thanks in advance!

Best regards,
Tsvetko Krastev