There are ISO images for Debian that include the non-free firmware, so your wifi should work out of the box. Any good search engine will find them for you.
The MX Linux repositories
: Backports galore! If we don't have something, just ask and we'll try--we like challenges. New packages: Inkscape 0.92.1, Pale Moon 27.2.0, Liquorix kernel 4.9-18, mpv 0.24, Kodi 17.0, Shotwell 24.5, Mesa 13.0.6