I don't quite agree with this view, because this is the requirement of cultivating calligraphers, and ordinary people don't have high requirements. They just want to write quickly and don't want to spend too much time and energy, so I suggest starting with running script, because running script is the most practical in daily life, and regular script is not.
Su Xi's 3S calligraphy practice method is specially designed for this purpose. Their slogan is "Only 60 hours in a lifetime". I bought it before, but it's ok, at least it's easier to learn and understand than the copybooks on the market. It's just that this book is hard to buy these years. You can search on Boku's website. There may be some videos. Try it.
Finally, I want to say that boxing never leaves the hand, and music never leaves the mouth. As the old saying goes, the same is true for practicing calligraphy.