It varies from network to network. If services are available on your chosen network, type /chanserv help register. If not, go to one of the help channels on your network.
Never compare yourself to others - they're more screwed up than you think.
First of all you'll need to join an empty channel by doing /Join #Channelname then goto a help channel on your network sutch as #Help or #IRCHelp and ask if and how you can register a nickname then how to register your channel