I thought any calligraphy stickers from calligraphers would be fine. The key is which one are you interested in? Is it from the four great calligraphers in ancient times? Huai Su, Mi Fu, modern Liu Bingsen, Qi Gong, Shen Yimo----etc.? Posting this first is critical.
The second is to come, there are those who come with your back, and there are those who come looking at you. Must come like.
The third is to observe and see where the author starts and ends.
The fourth is to first pillow your wrists and slowly practice hanging your elbows.
The fifth is to practice more.