You must practice block letters before practicing anything else. Regular script is the basis of other calligraphy, and it can only be practiced well if it is practiced well. Many teachers told me that when I was in junior high school. At that time, I could write regular script, but it was not very good. At that time, I liked running script and cursive, so I practiced running script and cursive. I don't know the running script and cursive script at the back, and the regular script is not decent, which is much worse than the original. I really regret not listening to my teacher. My handwriting now is really not as good as that of junior high school. I have two high school classmates, both of whom are good at writing. I once went to buy copybooks with them, and many copybooks sold in the market were not as good as his. I asked them how they practiced before, and they all stressed the need to practice regular script first.
The above is my experience.
Regular script copybooks are almost the same, but those in China are relatively better. If you practice regular script, you can prefer to spoil Chinese. If you want to practice running script in the future, you'd better choose Qiao Xiaobo's. I compared it with my high school classmates, and Qiao Xiaobo's running script is better. They just use Qiao Xiaobo's running script copybook.