Hi,
Write the Controller and P1 images to the appropriate SD cards and put into Pis.
Connect Ethernet cable, power up controller Pi which should obtain an IP from the DHCP server on your local network.
You should now be able to low into the controller ( username:pi password:raspberry ).
- Using a keyboard/mouse/HDMI
Once logged in you can turn on the Pi Zero by issuing the command "clusterhat on p1"
After a few seconds the Pi Zero will power up and bridge to the Ethernet on the Pi Zero.
You should then be able to SSH into the Pi Zero using the hostname "p1.local" from the Controller Pi or from the local network (assuming you have Zeroconf as above). Or you can also log into it using serial from the Controller by using "minicom p1" (which should show you the IP address on the login screen).
Once they're both up and accessible you can install any software/etc. as you would normally with a networked cluster.
Chris.