In what way does yuzu require a Switch? That hasn't been my experience.

just reading off their site: Prerequisites A hackable Nintendo Switch console (preferably a model that is vulnerable to the fusée-gelée exploit). Visit Is My Switch Patched? to check if your console is not patched. A microSD card with at least 32 GB of storage capacity. 64 GB or higher is recommended. A USB-C to USB-A or USB-C to USB-C cable to connect your Switch to your computer. TegraRcmGUI – Download TegraRcmGUI_v2.6_Installer.msi ums-loader – Download ums-loader.bin Hekate – Download hekate_ctcaer_X.X.X_Nyx_X.X.X.zip Windows users: Also download nyx_usb_max_rate__run_only_once_per_windows_pc.reg and run it for faster transfer speeds over USB. For details, see the NOTE section in the release page. This hekate configuration file – hekate_ipl.ini Atmosphére – Download both atmosphere-X.X.X-master-XXXXXXXX+hbl-X.X.X+hbmenu-X.X.X.zip and fusee.bin. Lockpick_RCM – Download Lockpick_RCM.bin NXDumpTool – Download nxdumptool.nro nxDumpFuse – Download win-x64.zip TegraExplorer – Download TegraExplorer.bin (Optional) JKSV – Download JKSV.nro Download this homebrew application if you wish to dump your save data from your Switch to yuzu. RCM Jig – We highly recommend one like this, but you could use any of the methods outlined here.

Fitgirl's repacks already contain the necessary files. These steps are unnecessary. :)

ok, thank you, can I also ask for the general idea of where to find these?

If you just want to play one game, Fitgirl's repacks are by far the easiest way, because she does all the setting-up for you. But if you want to play multiple games, you should be able to get them from the same places you get your NSPs. prod.keys and title.keys - I got mine from https://rentry.org/128bbkeys.