@Gerr This SitePoint page walks you through enabling the feature and your initial configuration: https://www.sitepoint.com/hyper-v-virtual-machine-tutorial/
Microsoft also offers "Hyper-V Server 2016" for free (there's a 2012 and 2008 as well), no strings attached. It's basically Windows Server Core with the Hyper-V feature enabled, an extremely minimal GUI for basic configuration of the box (not much more than creating user accounts, setting passwords, and enabling Remote Desktop connections). Beyond that you use PowerShell from another box to remotely configure it, or you can use the same Hyper-V Virtual Machine Manager tool that you'll use with the local Windows feature-enabled Hyper-V. I'm running my instance off of a USB 3.0 flash drive internal to my rack mount case... saving myself a whopping like 8 GB or something, but leaving me the option of moving all hard drives to another network attached machine without having to figure out how to migrate my Hyper-V Server install.