There are so many Handpan tutorial videos in youtube, also the professional players who offer an online course which free course for beginner and premium or Skype courses for advance.
These are some of the very good tutorials.
MASTER HANDPAN by David Charrier
HANDPAN DOJO by David Kuckhermann
HANDPANFAN by Colin Foulke
Learn Handpan, drum set and world percussion with Jacob Cole https://www.facebook.com/groups/448018175982625/?ref=share