Start with the characteristics of strokes, spread them horizontally and study them carefully. It is required that each word should have its own characteristics and be confused. A year or so, you can basically learn the essence of this post. Next, you can refer to the Li Yanqin Cup and get familiar with other inkstones. If you feel that the fire is coming, you can reach the level of aesthetic yearning for "Ma Gu Xian Tan Ji" and you can start to face it.
Please note that the order is irreversible. If you study The Fairy Altar of Magu first, it is very likely that you can only look at its shape but not its spirit. And because its realm is too high, those people with shallow skills are very likely to draw a tiger instead of a dog because of poor writing.
These are just suggestions. There are many ways to learn calligraphy, which is for reference only.