Motivation has never been a thing I worried about, but I hear it a lot. People think that they shall look for motivation before they start. But the only thing that really motivates is solving the problems at hand.

Very good point. Sadly a lot of people get frozen waiting for more motivation to come. As Manson points out in the book - the true motivation will be created once you start.

If you want to know how to do something, just start doing it. Which is exactly what those cartoonists told you:

If you want to learn to make a comic, you have to make one.