Excuse me, how to practice calligraphy is better? I don't know where to start, how to practice calligraphy and what materials to use.

Which calligrapher's handwriting you like, buy his copybook, first stick to it, understand it with your heart, and keep practicing for a while, and you will make progress slowly. There are many teaching methods on the Internet, such as volcano, Tik Tok and so on. It is unrealistic to try to figure out and summarize how they deal with the strokes and frame structure of Chinese characters while practicing. I wish you an early practice of your satisfactory calligraphy!