I remember using a mechanical typewriter with Midi-type connector and a printer driver (not sure what the terminology is) for C64. The typewriter manual contained all the codes to control the typewriter, like a terminal. Would be fun to buy one of those and try to re-implement your own driver.

The mechanical typewriter had a buffer, you were able to type faster than the printing head could bring it on paper.

You might get more interest if you include handwriting too.

I'm sure that your community has a typewriter guru who would happily kit you out. Chances are your club knows about them and can point you towards the right people.