Steps to connect to the dominions channel:
1. Get an IRC client,
this one is one of the easier to use.
2. If you got the client above, install and run the program, go under servers and select a gamesurge server, then connect to it.
3.Once you are connect it will prompt you with a list of channels, click add and put in #dominions as the channel. It will then be added to the list and you can select it to join.
I should also note that, despite the name blitz, games very rarely have any kind of turn timer.