The theory is abundant, but it abandons you at the only question that matters: how do you actually start. This is the complete on-ramp, from the first conversation to a running dynamic, including the two rules that bind the Dominus harder than the slave and the after discussion that turns inexperience into the engine of everything that follows.
The words survived the split. The meanings did not. Kink, casual BDSM, and the relationship the Dominus Effect framework actually describes share a vocabulary, which is why they are so often mistaken for each other.
An IKEA shelf and a bespoke library are made of the same wood and hold the same books. They are not the same craft. Anyone who confuses them is not being generous to the shelf. They are refusing to acknowledge that the library exists.