What are the better mold learning methods?

Now there are many people learning mold, and I want to engage in mold design and seek better learning methods ~

To learn the mold well, you must master the knowledge of related materials, understand the properties of various alloys, and the molding characteristics of various molds. After understanding and mastering the relevant knowledge, practice, apply the knowledge points you know and master to practice, observe the changes in the mold and the differences with your own understanding, and summarize.