Nothing personal but that's the furthest from the truth. If you have no idea what you are doing the FIRST thing you need to do is get someone to properly configure, secure and optimize the server. Setting the DNS up is one of the last things to be done on any dedicated box. If you wish to avoid all that then you need to register DNS nameservers, add those to your httpd.conf and a few other files as your main DNS for the server then update the domain(s) to the servers nameservers you just created.