Complete Noob here and I need answers to go any further into gamecube emulation on wiiu

I have Homebrew Launcher on my Wii U & vWii, and i access it through loadiine.ovh. My main issue is Nintendont. I want to figure out how to use only my gamepad to play the games, but I cant seem to find any helpful videos on how to do it. I am on 5.5.2. Also, what is a inject? I just really want

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