There is a good summary of the basic principles of Hormetism on the Overview page of this blog. But you might find it more approachable to read my wide-ranging interview on the blog of Julien Smith:
Part 1: Overview of Hormetism, cold showers, the opponent-process theory of emotion,
Part 2: Plateaus, intermittent fasting, making hard decisions, the generality of hormesis
If you prefer listening to reading, you might enjoy listening to this podcast interview of me explaining Hormetism to interviewer Jimmy Moore:
Podcast interview on the Livin’ La Vida Low Carb show