Quality of experience probably counts for more than quantity. The artist has some talent and is not an utter beginner, but he has some work ahead in order to advance his level of competence. The eraser work in particular is pretty good, if lacking in subtlety.
The image appears to be based on this reference. The artist needs to work on proportions. The artist also needs to work with a qualified instructor who can help him overcome some technical challenges and acquire some good habits.
The fact that it’s drawn from a photograph is immediately obvious. Note that drawing from a photograph is good practice in copying an image, but it is not at all like the work of rendering the view of a three-dimensional model in two dimensions. That skill set takes a lot of practice. The artist should remember that if you have a mirror, you have a model.
Also there are lots of cooperative models to be found in the produce section of your supermarket. Try rendering an onion, a bell pepper, a pumpkin, a bunch of bananas, or an apple, for example, and get the proportions right, the treatment of light and shadow, the values, the volume. Then see how those skills translate into images of rabbits and owls.