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.
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.
They're just protecting themselves; Nintendo's legal team is infamously tenacious and expensive to defend against, so yuzu can't give them the slightest indication they support the real day-to-day use case of their software.