Recovering data and reinstall Catalina on a MacBook 2012 after failed Sequoia installation attempt

MacBook late 2012. 2.3 ghz quad 4 i7 processor, 16GB RAM, 1TB. SSD.

I got Time Machine back ups.

I was watching YouTube and came across how “easy with the new GUI to trick your MacBook (or other way) installing Sequoia on a MacBook 2012. Cool! I’m relatively familiar with Mac, I am in terminal quite a lot, i think I got this.

I tried. I failed. It won’t even restore from Time Machine or a new install.

what it will do is vomit code 24/7 if I let it.

I am guessing, I mistakenly chose a setting in their mistake proof GUI that fragged whatever Mac calls its bios. I’ll attach a screenshot of some of code it just spews out.

in order now:

1. attempted to install sequoia on MacBook 12 using open source
2. rebooted on install from usb to recovery 20 times
3. Tried repairing the drives repaired said A-ok.
4. restarted once in safe mode
5. restarted. back to recovery.
6. frag this. I’m going back to catalina. Stick in my time machine drive and attempted to reinstall.
7. took all night and spewed code all night.
8. back to recovery.
9. tried reinstalling OS FRESH.
10. Another all nighter of spewing code aaaand back to recovery.
11. I went and bought a Mac mini m2. 16GB ram and 512GB SSD.
12. still need my MacBooks timemachine that apparently I can’t retrieve unless it’s installed. Lovely.
13. Help? I tried ahem EVERY way possible of getting an install of Catalina I can put on a flash drive and attempted that but I dunno. Is there a way to flash Mac’s version of the bios if indeed that’s what’s messed up?

sorry for the length. This has become my second and third job and new obsession and I hate it a lot.

[Edited by Moderator]