1. Yes, you must practice regular script before practicing calligraphy.

2. Regular script is also called Zhengshu or Zhenshu. It has high requirements on the basic skills of calligraphy such as horizontal and vertical strokes, as well as the frame structure and fonts of Chinese characters. It is the best way to write other seal scripts, seal scripts, etc. The basis of official script, running script and cursive script.

3. Only if you have a strong foundation in block letters can you have greater room for improvement in calligraphy in the future. Otherwise, you will never be able to improve your calligraphy level.