Product Owner Learning Path
As described in the Scrum Guide, a Scrum Product Owner is responsible for maximizing the value of the product resulting from the work of the Development Team. How this is done may vary widely across organizations, Scrum Teams, and individuals.
The learning path is organized by a set of Professional Scrum Competencies which each contain a number of focus areas. Resources are laid out in a prescribed order, however it is your journey, so follow in the best way that helps you learn.