The difficulty of hooking lines is that the lines should be slender and uniform, flexible and rigid, coherent and smooth. It will be easier to master a certain foundation of calligraphy, but it takes a long time to train superb marking skills, in short, drawing more pictures.
The difficulty of rendering is to be even, clean and subtle, which is much less difficult than tick marks. Of course, if you want to master it, you need to draw more pictures.
Therefore, meticulous painting is easy to learn and master as long as you practice more.