Understand the pen holding posture and the terms of hiding front and opposing front.
For beginners, regular script must be the best choice, because it can better highlight the structural characteristics of strokes and characters, and lay a solid foundation for learning running script, cursive script and official script in the future. After studying for a period of time, I can change fonts such as Wei Bei according to my own interests, but these are all based on good regular script.
Also, about ink, you can practice with smelly ink at ordinary times, which is cheap. If you write on rice paper and use cooked ink, it won't melt.
Pen, I have always been both rigid and flexible, but I don't think I can buy it now.
Start from Yan Zhenqing, and practice for a few years before practicing Wei Bei.
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I think practicing brush calligraphy is helpful for writing. Hard pen will make progress by applying those skills and text structure in calligraphy to the words written in peacetime.
It is naturally necessary to practice writing more, but it is difficult for ordinary people to keep practicing in their spare time. Even if they practice specially, there is no problem in writing it. After all, they thought about writing at that time, but they didn't think about work or homework. Nature is showing its true colors. My experience is that "consciousness" is very important, that is, pay more attention. If you find a good word, you can write it down anytime and anywhere, write it several times more, and use it slowly in your usual writing process, so that your own word will gradually go up a step.