You know how to do this, follow the prompts. Connect to a major network like EFNet, or Undernet. Basically whatever you want to get. After that lurk, or just sit and read what happens, for a while to get a feel for how the channel behaves. How long is up to you, but make sure you know what you are doing.
Most channels have a readme.txt or some file with the rules.
I suggest you read this. All rights reserved.