Copying lowercase letters well is a test of kung fu. Small letters pay attention to the meticulous strokes and the momentum of the whole work, which is a great test for the foundation of the book. I suggest you choose a calligrapher first, preferably a famous calligrapher in ancient times, to practice calligraphy. When you have both form and spirit, you can further copy the inferior characters.
Practicing calligraphy can be said to be a long process, and it is difficult to practice calligraphy well without foundation. But as long as you have enough patience and perseverance and are interested in calligraphy, you will certainly succeed.
If you don't understand, please ask questions and hope to adopt them!