The Hum gave an amazing workshop in Helsinki on decentralization practices back in 2018 during SociaTools, an event with graphics and branding developed by Super Eclectic.
Now is a great opportunity to take Patterns for Decentralized Organizing, their newly-released online course, where you can learn how to create highly effective, non-hierarchical, self-governing teams. Perfect for a public interested in horizontal structures, and for anyone trying to organize in a collaborative way.