I found the instructions for the labs clear and at the right level of detail for me that I did not have questions about what was required for the solution. They have a hints section that really get you started enough in my opinion, sometimes I looked at those a bit too early in retrospect. Then for understanding the part of the codebase that the lab was extending the book was sufficient as extra material for me. There are even lectures online for the 2019 version, but the theoretical side was something I had at least familiarity with before, so I did not watch those.