Typewriters, proper, pre-existed alongside punchcards for many decades before being incorporated into computer interfaces as keyboards. The fact that they did pre-exist computer keyboards may have led to them becoming the default so fast. While keyboards are amazing, they certainly weren't beyond imagination.

I guess you can say that QR codes, projectors, and cameras predate this Folk computer idea as well. But they are also far less intuitive. Using a typewriter well requires knowing basic literacy and a few new functions (carriage return, line feed, shift, etcetera). Graduating from a typewriter to a keyboard requires learning some additional functionality.

What current devices are teaching the basic functionality needed to jumpstart adaptation to this Folk computer interface?

As someone who uses punchcards regularly, I don't understand what you mean. People used a keyboard to punch cards since the 1930s or earlier. You type on a keyboard and the keypunch puts the holes in the card.