Partition size wasn’t specified in any step of the setup. If that is the issue, Is there any way to fix it?

It’s a ~138GB hard disk drive.

Holy shit, How fast do you type? And your explainations are so detailed, thanks a lot!

Is running two different operating systems on different VPNs and different devices also good enough?

Is using one service on the clearnet normally and the other service later after rebooting with TailsOS also a viable option?

Also, QubesOS seems like the perfect solution for me, thank you for the suggestion.

Yeah, I couldn’t find a good solution online either. Maybe It was a bit flip? Guess the universe sent a high velocity particle at my PC from lightyears away just to ruin my day, that’s the only explaination I have after seven hours of looking online.

Sure, I’ll check out some other distros.

This is after installing debian and booting it up. I used the “complete package” Iso they offer.

It’s a PC. Two Hard Disk Drives

1st Drive: SATA:PM-KINGSTON S

2nd Drive: SATA:SM-ST500LT012

edit: 1st one is of around 138GB, 2nd one has around 500GB

Yes, I have not been able to successfully boot yet. I have already rerun the installer and tried every solution I could find online in rescue mode. Tried repairing grub too.

No, I am not dual-booting.

This is the screen a few seconds afterwards

Okay, I will try again with a live-boot USB this time

edit: Thanks so much! This finally worked