My server ready, where to start?
Hello, I have my server ready. But I don't know where to start

Say, I have domain like example.com
In the email they sent me have following info:
Server Name: server.example.com
Server IP: xxx.xxx.xxx.237
Netmask: 255.255.255.248
Gateway: xxx.xxx.xxx.236
Secondary IPs: xxx.xxx.xxx.238-241
How can I setup my own nameserver? Should I go to my registrar and register ns1.example.com with IP xxx.xxx.xxx.237 and ns2.example.com with IP xxx.xxx.xxx.238?
And then I change te nameserver for my domain to ns1.example.com and ns2.example.com, right?
Secondly, I have build and install Apache 1.3. But it deny to start, look at the error log, it tell me: mod_unique_id: unable to gethostbyname("server.example.com")
I comment out the mod_unique_id in httpd.conf, Apache start without problem and running fine. But I don't know why that error raise? I have change the ServerName to localhost in httpd.conf too.