I hooked up a screen and keyboard but I couldn’t even login using the TTY (I didn’t install a DE). Maybe I fucked up when setting the machine up.

Good to know that at least I am not damaging anything. I should be more than safe if I halt the system and the do a hard poweroff.

Will that show the info only when I connect a screen directly to the machine? Or also when I log into it with SSH the first time after the reboot?

I tried that now. It’s still running but I can’t access it via SSH.