ns1.cprapid - nwb question

Hi forum, just got in here from aws free trial, is there a quick pointer on name server records? i setup a load of domains with the default assuming it was a valid name server and set the dns records in the registrar for ns1 and ns2 cprapid :p whats the best options? - set records manually with the registrar overtime a new domain is setup or create a name server for cpanel (does this mean having 2 cpanel accounts for primary and secondary on a different ip address block ? ) thanks bert