use zadig 2.5 , not the latest version, install the driver libusK ( v3.0.7.0) , whilst switch is hooked up to pc , in dbi app on the switch , hit install title from usb , zadig should see it as a dbi device in all devices
have u tried wi usb helper ? or wup installer ? or teconmoon injector ? i use these 3 things all the time , its pretty easy to setup n install games loll
morn ,just put a sd card in the slot , it will probly start to format , and automatically install files and folders to the right places , the rest( homebrew launcher bit ) you can can do after, its a simple drag n drop into the sd card