What do I do about this?

Edit: Nevermind, ignored the part where it says to "Use "C:" as destination. My bad!

Sorry! I made a mistake in my post. I used rpm-ostree, not dnf

How would I do that? When trying to add my printer, it wouldn’t let me continue unless I selected a printer model

Edit: I found the generic printer option under the model selection. However, when I select it, the paper goes through the printer but nothing is printed

Ventoy is an open source tool to create bootable USB drive for ISO/WIM/IMG/VHD(x)/EFI files. With ventoy, you don’t need to format the disk over and over, you just need to copy the ISO/WIM/IMG/VHD(x)/EFI files to the USB drive and boot them directly. You can copy many files at a time and ventoy will give you a boot menu to select them.

Source

That worked! Thank you very much!