if you look back at various blogs and articles, you will see that there is a repeating pattern: there is more-or-less predefined set of tasks that you need to do in order to get the installation of Server Core up and running (activation, IP and firewall configuration, domain join, feature installation, configuration of Remote Desktop and etc...). All the tasks are performed at command line, but there is no single utility/interface and for each task you need to know what command to use and what are the parameters required in order to complete the task.