A free mirror-based layout that goes beyond just letters: https://99percentinvisible.org/article/one-hand-touch-typing-setup/ https://99percentinvisible.org/art

A free mirror-based layout that goes beyond just letters: https://99percentinvisible.org/article/one-hand-touch-typing-setup/ https://99percentinvisible.org/article/one-hand-touch-typing... There are other options, but hardware solutions are really expensive