This is my first "server" distro.This info seems older, but it still may work. This info seems a bit more modern, but both of these may work.
If you are not very familiar with Linux, is there any particular reason you are starting with a server distro instead of something that is more user-friendly for beginners? I'm not sure, but I don't think MATE will be their desktop, unless you have installed it manually. We can find out after you get the desktop to load.