The best training (and argument for CL work) Ever! was -
Wait for it . . .
WordStar !!!
The mnemonics were GrrreaT; antithesis of the anal unassociated detritus in Word Imperfect's random labels. From superscripts to block markers, etc. - you soon memorized the scheme; never had to take hands from kb == a natural for the {then still} touch-typists, just naively entering the mind-fuck black hole of 'computers'.
Ex:
One time was watching SO, a super-fast typist - composing a paper for a reactor physicist, with ton(ne)s of 92U235 type refs and (simple) equations, not needing math graphics (which WS couldn't then do). In the amount of time spent *here* on one "U-235", even with wee codes: she could have entered 5-8 isotopes. When you have to bloody MOUSE for it - make that 8-12.
Ergo: anyone trained on WS would be the last to bitch about kb entry.
Of course, anyone neuron-debilitated by fucking Doze AND who never learned to type ..
CP/M Rulez
Still.