Master calligrapher, come on.

Personally, I think you can skip the training class. You can write hard pen anywhere, at work and at home after work. Calligraphy training classes don't need time to practice. If you don't have a foundation in calligraphy, you can buy two red copybooks (the kind with a thin white paper on it). Pay attention to writing time. What are the different ways to write the copybook, and what are the same as your previous ways? Pay attention to correct the differences. When you feel a little writing, you can look at the copybook and write directly in the notebook. Personally, I think there is no trick to writing calligraphy. As long as you have time, write for a while, be diligent and pay more attention to other people's writing methods. Success comes naturally, and it is difficult to write badly.