In fact, to tell the truth, I personally think it is not good to practice calligraphy with water books and cloth. The reason is that the permeability ratio between cloth and water is constant, that is to say, the written words are basically the same in shade. The effect and feeling we write on wool paper, base paper, cooked paper, semi-cooked paper or other paper are definitely different, and water-written cloth can't do it. Ink painting is not conducive to our understanding of the pen and ink in writing. If you really want to use it, I can also recommend it to you.
Personal opinion, for reference only.