Removing the GUI from Zorin

I wanted to turn an old computer of mine into a home server and I figured I'll use Zorin lite on it. It's all well and good but how can I remove the user interface so that I only have the command line to work with? The UI won't be of use and will clear up processing power. I tried editing the GRUB configuration file, changing GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" to GRUB_CMDLINE_LINUX_DEFAULT="text" and I thought that was it as the system booted without any UI, but then when the OS fully loaded, the Login screen came on. Preferably, how can I switch to the text based UI without fully removing the XFCE GUI?

You can just regularly log in to tty.

Yeah, I was able to do that with this command:
sudo systemctl set-default