

Assuming I’ve already lost all friends/family then yeah, a cabin in the woods fending for myself sounds nice. Otherwise all things considered I’d try to be the friendly type, having more people in your group is usually better than being solo.
But all that probably means I’d die in the first year LOL. Most likely wouldn’t cut it being alone and starting out I’d probably have the bad luck of picking the wrong type of “friends”. To really stick it out in that sort of situation you probably have to manage to survive through a few groups of people starting out until you end up with a stable group of people willing to work together.
Just as an FYI, normally you would enable or disable secure boot before installing an OS, not after the fact. Otherwise you usually end up breaking the boot process.
Normally you should be able to hit Enter and then follow prompts to get into the BIOS. Maybe hit ENTER then just keep hitting whatever key you were using to get into the BIOS prior (F2, DEL, etc.).
If none of that works try powering off, removing the hard drive, then power back on & see if that lets you get back into the BIOS.
If that still doesn’t work I suspect the laptop is still stuck in power on mode, maybe the internal battery is keeping it on. Try to see if you can actually power it off for real e.g. hold the power button down for x seconds until you see lights go out. Try to keep an eye on how the laptop behaves when powered on vs lower power mode vs full power off.