Hard-pen calligraphy lovers, seek expert advice!

Judging from the handwriting, I have learned a little running script, but the foundation of regular script is not good, and I am completely unfamiliar with strokes and knots. They are all handwritten. If you are interested in calligraphy, I suggest: first, choose your favorite copybook; Second, divide the post into three parts to practice the structure and rules of strokes; Third, practice regularly and quantitatively every day, so that your writing will be completely transformed after two months.