::Is it difficult to learn?::
Touch Typing is like any other fine motor control skill in that it takes time and practice to learn, but once learnt is never forgotten. It relies on ‘muscle memory’, which is fashioned over time through repetition of a given motor skill and the ability through brain activity to remember it. Activities such as brushing the teeth, combing the hair, or even driving a vehicle are not as easy as it looked to the beginner. As one reinforced those movements day after day after day, the neural system learned those fine and gross motor skills to the degree that one is no longer required to think about them, but merely react and perform. It is in the same way that we can learn to ‘touch type’.
This learning process could take months, even years, to perfect depending on the individual's dedication to practice, and their unique biochemical neuromuscular learning system to retain that practice. However, once muscle memory is created and retained, there is no longer the need to actively think about the movement and this frees up capacity for other activities (eg. concentrating on the content of what one is writing and not on the mechanics of typing).