While I recommend viewing everything in the course, to start improving more quickly identify the items that you feel are weakest. Avoiding blunders (6) is great for everyone. If you don’t have a set of openings you feel confident with, opening fundamentals (2) followed by perfect openings (3) would be a great place to start.

Regardless, module 1 is a great introduction to the course. I went through everything in sequence and come back to review areas where I haven’t fully incorporated the lessons into my games.

Best of luck on your journey.

I would say it depends on where you are at now. If you are less than 1000 ELO then I would do (1) Setting yourself up for Success (2) Opening Fundamentals (3) Openings for White & Black & then (6) Avoiding Blunders. If you are already 1000 elo, you probably already know items (1) & (2) and there are better openings for beginners than the ones provided in (3). So I would start with (6) Avoiding Blunders then chapters (4) (5) & (7) giving you some tactics, middlegame, and calculation help.

I liked the additional considerations of the two openings. Also the blunder check lesson.

I second everything thing John, Nate, and (the other) Keith said. The module on blunders is one of the most important in my opinion. There is some very important material in Module 4 (Tactics), but it is a looong slog… I still have two lessons to go in the module and I want to rewatch a bunch of them.