The dulcimer is a hit with everyone because it really can be picked up and learn to play it within minutes. Of course that is just the basics but still.
Included here is a playlist with 28 lessons and a slew of additional material and play along songs. Around 189 total videos. Start with the first video and just keep going. There are several buttons at the base of the video to skip, previous, pause, fast forward, etc... Have fun!