If a glass of water is full, then there is no way to pour other water in. You have to pour out the original water first. The same is true for calligraphy. If you are stubborn and add your own when studying, It is difficult to make great progress in style. First, you can choose a copybook according to your preference. Here I recommend following the development of Chinese calligraphy, that is, starting with small seal script, then official script, and take your time. Next is copying. When copying, you should pay attention to structure and brushwork. These are two different concepts. Keep training until you feel you are almost there, then try to jump out and write whatever you see. Then look at other copybooks, or what people around you have written well, and get a comprehensive understanding.