Learning calligraphy should be "law-based", that is, learning better copybooks, recognized monuments and copybooks. Those who like the Han and Wei Dynasties started from the Han and Wei Dynasties, and those who like Tang Kai started from the regular script of the Tang Dynasty.
I recommend you to start with the "calligraphy imitation post" in the calligraphy museum. There are many copybooks. If you don't understand, you can consult. That's where I started, and I started quickly.