Here is the full list of all 10 SHOWMAKER achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Setup your first stage.
Finished recording for the first time On Air.
Placed an camera on the track.
Placed an effect on the track.
Placed a top light on the track.
Placed a back light on the track.
Played a song for the first time On Air.