To use it, you can either
- Go to https://oftc.net in your browser (this used to work with Tor-Browser, too, but OFTC currently does not like Tor).
- Dial in with one of the many chat clients as for example Pidgin, which you might already know from using it for Jabber+OTR.
Whichever method you use to connect, it is recommended that you cloak once you have connected to the server. To do that, just type
/msg nickserv SET CLOAK ON
into the chat window.
There is an additional channel which has news fetching irc-bots in it: