Please avoid this book because it teaches you how to live mindlessly. Basically, the advocation of the book is for you to make rules for yourself and follow them unwillingly which is very toxic. In an imaginative way, it makes you being lorded by an invisible tyrant which is not worth it.
The knowledge is too straight-forward and leaning too much toward self-help. If you try to extract useful information from the book, it would be very little.
Instead, I would recommend you to try meditation. When you meditate, you would be informed by the surroundings and you can also develop awareness to the information. That would help you make better decisions.