Practice "One Finger Zen"
The thumb, index finger, and middle finger are held a little far from the tip of the pen, and the little finger is used as a support point. The strength is relatively uniform and easy to control. The color of the strokes drawn by the different strength will vary in shades.
Note that the most important point in the above sentence is "use the little finger as a support point". Many beginners say that they have problems with uneven coloring, poor control of the weight of the pen, etc. In fact, this has a lot to do with the posture of holding the pen. Of course, when you first start practicing like this, you will be very tired, as if your little finger is about to break. However, this is the only way to learn to draw. If you look at the hands of those art students, they are all cocooned, and some even have their little fingers deformed. Therefore, it is necessary to practice "one-finger meditation" well.