This article has been very helpful for us, and because it deals not only with Developmental Coordination Disorder (dyspraxia) but any physical challenge it very well describes the rationale behind access to technology (in this case, typing).
In Y3, DS was assessed in the 2nd %ile for fine motor skills - and we were told it was not a significant enough impairment to warrant services (because he was a bright child, being held back
In Y6, DS finally was given consistent access to a computer to type his work. At the end of Y7, the school gave him his own computer for lessons (which was a boat anchor - slow, underpowered and a right royal piece of garbage). I found a good notebook computer for a very good sale price and gave him his own computer at the end of Y8 - he uses this at school, knowing that if it gets damaged, he'll either have to go back to the school one or replace it with his own savings.
Now, in Y9, he types an accurate 120 words a minute (far better than I can) and the quality of his work has skyrocketed. He still writes for maths, but everything else is typed, and what has been gained in reduced time and (unnecessary) effort has translated to far better quality of work - not only in complexity of the finished product, but in spelling and grammar as well.
Bee, on the other hand, has had access to tech constantly. At almost 8, with a pencil and a special molded grip she can nearly write her first name (it looks like a child in nursery would write) but types all her school work (and I have been told she is working on writing a book at school). She uses predictive software (so she types the first few letters of a word, then chooses the correct word from a list) and a touch-screen laptop computer. With these support methods, Bee is performing at the appropriate year level for language.
Frankly, as tech becomes more and more a way of life - the ability to type accurately and quickly is a very important skill. As for "learning" to type - unless your school demands it, "touch typing" lessons are not absolutely necessary. Your child will figure out what hand placement and key stroke patterns work best for them. DS here never "learned" to type - he just did what worked for him. What feels natural for the child, especially if they have any sort of physical challenge, is what will work best for them.