That's hilarious! Could work but I'd need the keys correspondence shown on the pic while typing: if physical 'f' key (on a QWERTY keyboard) is now 'p', I need to see "p/[f]" at the physical location of key 'f'.

Then a nitpick:

> "For example, if you type only "the" all day, then when you press the letter 't' the letter 'h' will be on the home row."

'h' is already on the home row on most keyboards.

frequency analysis would probably fix your fix.