First check if the “mkeventd” service is running with “omd status”.
The documentation shows the screenshots and steps for the current production version 1.6
With your beta of 2.0 it is a little bit different.
On the left side go to “Monitor” and there to “Event Console” - “Events”
You should see an empty view. If this is there then your “Event Console” is working.
Now you can use the “Setup” button and use the search field there with “event” as search term. On the top should be “Setup” - “Event Console”.
From there you can use the manual to setup some rules.