I found the Japanese Udemy course How to mange your team to be very informative, so I'm going to write down some of what I learned.
The whole course was only 2 hours long, and at 1.5x or 2x speed, you would finish it during your commute, but the course has a lot of important things. It was quite informative and I highly recommend it.
This article briefly describes the motivation and overview of the course, and then presents three things I learned, in the form of a summary.