How to draw a good human sketch?

Beginners should pay attention to the mastery of human body structure, bones, muscles and other structures.

Don't pursue perfection, ask for details, and study the structure of a joint thoroughly. You can't leave questions.

As for the steps, it should be consistent with portrait sketch, from whole to part, and now from part to whole.

If these problems are solved, we should consider the characteristics and demeanor of the characters.

Finally, it should be your own play.