Ok, I finally figured out what the problem was (it was something stupid as usual, and I am truly sorry for wasting your guys' time because this was something so simple that I just overlooked it). So someone over on the manjaro forums told me to remember to take out the usb drive after installing before restarting, so I did that, and it didn't seem to have any effect. But I was just curious, so I went into my BIOS and started looking around. I went into the boot menu, and saw that for some reason the NVME that I had installed manjaro to wasn't in the list of boot priority, rather it was in the part where it has other drives that aren't in it. And sure enough, when I put it into the boot order, and booted the computer, I found myself in the complete version of Manjaro KDE and am now messaging you from there. You guys have been a great help, and I as I said before (when I thought that I was finally done and would have linux installed by the next day haha), without you I would still be desperately searching the internet.
Glad it's sorted. Wouldn't entirely blame myself if I were you. Hell, I couldn't find the virtualization settings to enable KVM on my board, but luckily MSI decided to include a search function. I also struggled with boot order coz it shows multiple devices for the same device :shrug: so you're not 100% alone there.