Since ancient times, many people have said that strokes and structures are actually inseparable. The structure of a word is largely completed by strokes, such as long horizontal lines and hooks, which is an important guarantee for completing and realizing the structure. The simplest and most effective method is repeated copying.
If you want to improve quickly, you can read some books. I don't think you need to see anything else. Just look at the 92-frame structure of Huang Ziyuan in Qing Dynasty. Huang Ziyuan's handwriting is stiff, but he has a thorough study of structure. Another way is to find a teacher and practice under his guidance. This is a very effective channel. It's best to find a teacher directly from a hard-pen calligrapher, or you can take some correspondence classes.
In fact, if you are a beginner, it is enough to remember three words: flat, straight and flat. Some people have practiced all their lives, accumulated countless ideas in their minds, tried various faces and styles, and realized that these three words are wise words when they are old.