Dr. Michael Harner explored many different shamanic cultures and tried to summarise the more or less essence of them in his book "The way of the shaman" and workshops:
I started my journey with the books of Carlos Castaneda, who claimed to have met a Mexican shaman of a strange international tradition. Facts of fiction, but I found the books very inspiring. And 1994 I booked my first weekend to dive into the adventure with a basic introduction. Over the years I added Extraction and returning of lost soul parts, psychopompos work, shamanic counselling and dream work with Enrico Cosmos. In 2010 in Colombia i made first experiences with Ayahuasca ceremonies, tabac and coca (I do not offer any of those). Also my singing and sounding has originated in this field of experience.