I've been seaching and googling for an answer that I just can't find. I have a vps account with no nameserver and have been told I need to make the nameserver myself. Does anybody know of any good tutorials or could explain how to setup the nameservers. I have already added all of my ip addresses to my account cpanel/whm but am struggling with this nameserver problem. I have tried going to the "basic cpanel/whm setup" panel then click assign ip address but that just leads me to a screen with a loading bar which stays there for at least hours and had to cancel it since it seemed like an infinit loop.
So please, can anybody guide me to how to setup a nameserver without registering or paying for a new domain.

Control panel: cpanel/whm
Operating System: CentOS