After part 1 you should be up Update Subscription so you can join the Godzilla beta. Here are the steps for installing Ubuntu 16.04.1 LTS Server and setting it up for use.

We are using Ubuntu Server because we don't need the extra parts for the desktop (like the GUI layer) and we do need the server components. We are using the LTS (long term support) release. You can download it from Ubuntu's website.

You can either install it in a virtual machine (I used Parallels on my macOS MacBook Pro) or as a bootable OS on your hard drive.