In my Web Server Management course, we use Ubuntu Server (without a GUI) in order to learn how to configure the Apache web server for various types of scenarios.
The installation of an Ubuntu server is essentially quite trivial if you do not need to worry about any type of specialized configuration.
In this video, you will see me walk through the installation of the Ubuntu 20.04 ISO onto a Hyper-V machine (the Hyper-V VM is already configured). All default settings are accepted with the exception of the installation of the OpenSSH server which should be enabled.