I suggest you look at the handwriting of Wang Houxiang, Wu Shenyuan, Yang Zaichun and Qian Peiyun. Pen copybooks now account for 70% to 80% of the market, but in my opinion, there is a better choice. The ones you cited are very famous, and the handwriting is not bad, but I think the handwriting is too regular.
How to practice calligraphy
To practice calligraphy, we must first master the correct writing and writing methods, and then we can practice from copying inscriptions. In addition, we should comprehensively improve our artistic and knowledge literacy. Generally, you can stimulate your enthusiasm for learning books by participating in calligraphy exhibitions and competitions, so as to improve your artistic accomplishment.
On the basis of mastering correct techniques and learning methods, we can learn calligraphy well by studying hard and studying hard. Refers to the reality: the fingers should be solid, not weak, but not too dead, otherwise the fingers will not move flexibly and the written words will be stiff and inflexible. Don't be too loose, the words written by the pen are soft and weak, and there is no wind.
Palm deficiency: when writing, the palm should be empty and the fingers should not be bent. Don't stick the ring finger and the little finger on the palm of your hand, as if holding an egg in your hand, and the tiger's mouth between your thumb and forefinger should be wider. In this way, the pen can be steady and flexible.
Straight: When writing, try to keep the pen tube vertical on the paper, so that the strokes are easy to stay in the center. However, in the specific process of carrying a pen, the pen tube sometimes has to be tilted. What is important is that it can be straight when tilted and its center of gravity is stable.