You can download the seeddb.bin online with the seeds i did it on my N3DS and imported my seeds offline with FBI you need to extract the seeds from the seeddb.bin first but i dont remeber how i did it.
You can do it with Hekate plug a usb cable into your switch and pc load hekate go to tools then usb tools and then click on sd card and your sd will open up on your pc.
Hold reset when you power on your wii and see if it boots into priiloader if it does then go to the homebrew channel and uninstall the wads you installed unless its a system menu wad.
I have an issue with atmosphere v1.6.2 when i boot into cfw right after the nintendo logo it goes into sleep mode i have to press the home button like three times to get it to turn on after that it works normally it does not happen every time but most of the time i dont know if its an atmosphere...
I got one at gamestop but really from what i understand you need to use a cable with a 56k ohm resistor then it wont fry your switch the pro controller usb cable has it same with all nintendo switch cables.
It plays wbfs files just like any loader format your usb stick to fat32 32kb and use wii backup manager to transfer your wbfs or iso files to the usb stick.
Inside the BootSoundNX.zip copy everything from atmosphere/titles to sd/atmosphere/contents then it should work. The folder structure for atmosphere has changed since bootsound was released the titles folder is now called contents. you can also delete the titles folder from your sd card since...
Inspect the pins on your joycon one of them could be bent if not you may need to open it up and have a look it sucks that joycons are so expensive and they come drift prone.
Just take the hard drive out of the enclosure and put it in a new one i have bought like six of these and they all work with homebrew no matter what hard drive i put in it. https://www.ebay.com/itm/275939372011
I think the vWii well usb loaders checks usb port 0 last so it checks the other usb ports first and finds your wii u hdd tries to mount it and fails to load at least that was my experience with my Wii U.
I found you can download the original theme with modmii load it up go to option 3 system menu themes and get the one called original app and install it with mymenufymod you can also get this from modmii option 2