Ok, I do not understand all of what you wrote, but I'm gonna try to make my best out it.
First some basic stuff. When you are in the "GBAtemp IRC" this means that you're connected to GBAtemp's IRC server (irc.gbatemp.net:5190). Within this server there are (discussion) channels, with the main channel being #gbatemp.net
(The following is all assuming that you have a registered nickname on GBAtemp's IRC server.)
To create a new channel you first need to join this specific channel, this is usually done by typing "/join #channel", replace channel for the name you want for your channel. If it's empty/not registered then you should get operator status in said channel.
From here you may want to go ahead and register the channel. This is done by typing "/msg chanserv register #channel channelpassword channeldescription" (obviously replacing #channel, channelpassword, channeldescription with appropriate content).
At this stage you should have a channel of your own, however there are a lot more things that can be configured regarding your channel and it is not possible for me to go into all of it. But additional help regarding channels can be found by typing "/msg chanserv help" in your IRC client.
Info and options regarding a channel bot can be accessed by "/msg botserv help".