That NVR is plug and play. Plug a camera into port 1, and it will show as Camera 1 - You can also manually configure if you like. This will set a separate IP range for the internal LAN (switch). Set the other LAN to match your home network. If you want to be able to access the cameras from a browser, then you'll need to turn on "virtual host" on the NVR. That will give you a link on the NVR's camera config page for each camera.
The easiest thing to do is hook the NVR up to a monitor (HDMI or VGA) and go through the setup wizard. That will set the admin password, set the time zone, set all cameras to motion or continuous, set your IP address (or turn on DHCP). Then just plug in your cameras and wait for them to boot up. Job done, unless you want to get fancy.