I recommend Kuniharu Shimizu’s blog See haiku here (all about haiku+artwork, photo, prose) featuring haiga, haibun, reflection on art and poetry. Very original haiga using illustrations, photos, etc.
Start by reading this post about Japanese calligraphy masters asking why a foreigner would chose to do sumie instead of using western tools of expression.
You don’t have to know sumie to do beautiful haiga. Kuniharu Shimizu’s blog is a beautiful illustration of that.