What is the hardest and the easiest? This question is very strange. Because if you want to learn best, it's not difficult. Relatively speaking, Yan Ti and Zhao Ti are relatively easy to learn, but it is not easy to learn well.
Liu Ou's two families had a difficult start, but they were experienced in writing.
Chu Suiliang's calligraphy is elegant, extremely difficult to learn, but extremely beautiful, which is called the word of autumn beauty.
Yu Shinan's and Zhiyong's ci have also appeared recently, which seems dull but well written. Plain is the most difficult thing to learn, but Zhiyong's brushwork is authentic in Wang Ti, which can be used as an introduction.
Searching online for the characteristics of Yan body will come out a lot. Don't say it's useless, right?
As for attention, it can be mentioned that it is easy to be broad-minded and clear-headed. Don't blindly bloated pen and ink, but pay attention to its clearness, that is, the so-called "thin tendons are as deep as autumn eagles". This metaphor is very exciting.