1)
Check this sticky 2) As most networks do differ slightly, the best place for detailed information regarding network services (ie: registering a nick, registering a channel, using the channel service to control the channel, etc.) is the network's help channel, usually #help.
If you still can't figure it out, and aren't getting much if any help from the help channel (which shouldn't happen), post here with the network information (ie: network name and/or server address) and someone here might be willing to connect and help you out one on one.