The parts are in learning order, and reading them in order is the best route if you have the time. If you do not, pick the path that fits your work.
All nineteen parts in order: about 55 hours of reading when the course is finished, and about 100 with the exercises and code.
Focus on the Build it sections, the What breaks stories, and the DCLink steps.
Focus on the rules each lesson states, the checkers in the listings, and Part 15's assertions, monitors, scoreboards and coverage.
Read every Principal lens, the design-space tables, and capstones 3 (design a protocol) and 4 (design review).
Week 1: the "Protocols compared" and "Drills" page of Parts 3 to 10, plus every interview corner in those parts.
Week 2: Part 16: Protocols Dissected for the protocols on the job description, then Part 18: Interview Preparation.