Can calligraphy be introduced in any style?

Calligraphy can be introduced from any style.

But if you want to have solid writing ability, you must start from scratch. Because regular script is the basis of frame structure and stippling form practice. The stippling of regular script is more varied than that of official script. If it is purely for the purpose of practicing pen power and control ability, you can practice it with official script. When the writing ability is reached, we can focus on practicing regular script to achieve the accuracy of stippling and master the composition principle of words.