Bookstores, the Internet, and even some stalls selling Copybook for calligraphy sell them.
Of course, you don't have to buy it. There is a video on the internet, which is very complete.
But what he said was really not Wang Xizhi's way, including Liu Ti, Li Shu and so on. It was wrong to use a pen, knot words and brush. Of course, it's ok to have a look.