What's hard about it is that no matter how many exercises I do every day, I then have to go back to work and be able to fully type at the speed I am used to. So, I can't really build the habit of touch typing or get faster at it because of that.
I was lucky that I picked up during school so that it wasn't as much of a sacrifice of productivity.
What is your current typing habit? Do you pick-peck or is it some variation of the standard touch typing technique.
One thing I tried when I started touch typing as well was to progressively learn it. e.g.: "I'm just going to focus on using the correct finger for this one symbol/character for now" and just do that until it became natural. Can integrate that into your work potentially?