PsychoMantis the first one you need to download the standart version os batocera .
after edit #nvidia-driver=true to nvidia-driver=true .
dont use wifi, use direct connection whit ethernet kabel .
about hdd , tray choosing until it saves you need restart system .-
about sound bether you user DVI converter do hdmi . in the case press STRG+ALT+F4 and you enter on your sound configs, press f6 choose your sound card. activate M to 00 .
go back and up the sound volume from your soundcard line .