There is nothing wrong with writing strokes first, but I personally don't think it is necessary to pursue strokes too much, as long as you have a cognition and master the basic skills. It is very important to teach him from the composition of Chinese characters, and the overall structure is more important.
At present, there are many training courses in calligraphy education, most of which are the same, so you will see that the children taught are all in a pattern, and the strokes written are very deliberate. Although this progress is rapid, it is not good for children's long-term development.