How can I introduce touch typing to my child?

My child is 8 years old and I bought Typesy for him. How can I explain and make him start typing?

Hi! Take advantage of the fact that the child hasn’t yet developed their own hunt-and-peck touch typing habit and use this opportunity to introduce solid and efficient typing habits. First, take enough time to introduce the keyboard to the child. During the familiarization process you can introduce basic rules of ergonomics, regarding the ideal sitting position and wrist placement, monitor distance and height, as well as more to-the-point rules with regard to finger placement on the Home Row keys.