This is a normal phenomenon. First of all, even if you are stiff, you should follow the requirements of the strokes. Then practice regularly and understand the writing process of each character in the copybook. Beginners often have strokes due to poor writing skills. When the hair is spinning, you will be nervous and your hands will be stiff. So first we need to understand the process of writing. In addition, you can try to imagine Tai Chi or smooth arcs in your mind, and use your hands to coordinate with your brain movements to exercise your wrists and fingers to control the brush. Finally, you can play some light music or try to calm your mind. Relaxing the pen and making a hollow fist is also an important part of calligraphy to cultivate sentiment and cultivate one's character