Install, then run as user with all configuration files in ~/.config/mpd/.
Go down config list, copied from /usr/share/docs/mpd/ or something.
mpd-configure
# Problem solving
I couldn't change volume, so in mpd.conf I uncommented the pulse audio lines and restarted mpd. This allowed pulse audio output, which allows volume change via mpc.
Also, make sure the user mpd is part of the group pulse: