Pop OS BusyBox FSCK Not Found (Beginner)

I broke Windows 7 and can't fix it, Windows 10 on my laptop broke itself. Decided I'd leave Windows behind and give Linux a test drive since my laptop's OS is pretty ruined. I did the install, my laptop restarted, and now it's perpetually in a thing that calls itself BusyBox v1.30.1. Every solution I looked up said to do an 'exit'. So I did an exit, and it says "Alert! /dev/mapper/data-root does not exist." Every fix I've found says to do 'fsck' followed by a bunch of different things, but typing anything starting with fsck returns 'sh: fsck: not found'. I've searched everything from "fsck not found" to "fsck doesn't exist" to "file system check doesn't real" to no avail. Someone in some forum of some kind said to another user "You need to boot from a Ubuntu Live USB" so I was up til 4AM last night flashing Ubuntu Live to a USB, and all that wants to do is install Ubuntu on my computer, when I was aiming for Pop_OS. Another said to set something to something else, and I don't know how because all I see is BusyBox, and the command to do it wasn't found, and 'root=/dev/sdax' did nothing useful. I figured I'd ask for help first. What do I do? I can't find a solution to fsck that up and escaped its tank. I'm by no means the average consumer computer user, but my knowledge is fairly limited, so please keep that in mind. I've never buntu'd before and still don't know what 'kernal' or 'shell' means. If you have any questions or solutions, I'll be over in the corner trying to sort this out.