You have said so much, I can see that you are a dedicated calligraphy lover. In the process of practice, you should sum up your own experience seriously, which is good, improves quickly and has a good learning attitude. Writing seal script is a very difficult process, so I advocate that especially children should learn from an early age. On the one hand, they can communicate with each other and write fluently, on the other hand, they can master the symmetry of fonts, which is good for people's body and mind. I think the first thing to learn seal script is to find a copy book that is not difficult, such as Shi Guwen. There is no time to delay in practicing calligraphy. You should do it bit by bit. As for the brushwork of seal script, you can download some teaching videos of calligraphy, which can solve all the skills mentioned in your article. Writing seal script is to learn to turn the pen and wrist to make the palm and wrist smooth. After a period of time, you can practice the "natural thinking" plaque and write seal script with Fang Bi to see what it feels like. At the same time, I think you should write more about Oracle Bone Inscriptions and Da Zhuan.
The above words are pure nonsense, be generous.