OK, for anyone like me who did not grasp this simple process at first :). Here is a much expanded answer, using a different IRC service, webchat, which runs on a browser.
To use IRC for the first time:
1.Go to a url that hosts IRC such as;
2.Login anonymously at first because you have not yet registered.
2a.Enter your desired username handle, a chat room you wish to enter, and answer the captcha question.
2a1.Do not use 'Auth to services' checkbox, which only works after you register.
2a2.The Audio captcha checkbox is provided if you prefer a sound.
2b.Here is a screenshot of the GUI, via a nice Youtube,
3.The system will open into the IRC console.
4.The last message may notify you that your desired chatroom cannot be accessed because you have not yet registered your email address.
==#pyladies Cannot join channel (+r) - you need to be identified with services
5.To explore and see what commands are available, any of these commands may help you. (There is a white box at the bottom of the screen for entry of commands.)
/msg nickserv help
/msg nickserv help register
/msg nickserv help commands
6.To fix the lack of registration, first tell the system what password and email address you prefer.
6a.Do NOT use a secure password; you are on HTTP!
/msg NickServ VERIFY REGISTER yourDesiredPassword yourEmailAddress
7.Check your email and type the message it provides for you, such as;
/msg NickServ VERIFY REGISTER yourHandleUserid yourSpecialCode
8.You cannot successfully run
yet, because you are still officially anonymous.
9.Quit the session, eg close the tab, and re-login, this time using authentication.
10.Hopefully you are redirected directly into the chatroom and the wide world of IRC!