This is a normal response for that command (or at least I see the same response as Jack is using the audio device).
aplay -l will list your audio devices
You could try ps aux | grep jack to see if jack is running - if it is, that should return something like:
we 1306 0.0 0.0 4376 568 pts/0 S+ 21:49 0:00 grep --color=auto jack
we 2671 3.1 9.1 98544 91568 ? SLsl Mar14 49:38 /usr/bin/jackd -R -P 95 -d alsa -d hw:0 -r 48000 -n 3 -p 128 -S -s
from your journalctl output, it looks like jack is not starting properly.
you might need to hold up and wait for a new cleaned up image to start over.