Just as a shameless plug for anyone reading the replies - I'm working on creating a touch typing course for developers here: https://typeright.herokuapp.com. Still lots of work to do (hence the lack of domain name) but I hope to finish it in the next month when I have time. https://typingclub.com is great if you just want to learn to touch-type in natural language but I found it and other courses didn't help my typing skills for coding that much so I'm building one myself.