I probably shouldn't be surprised but you can sign up to be a volunteer transcriber of documents held in the US National Archives! Apparently they are particularly looking for people who can read cursive for the current Revolutionary War pension document archive project, but there's plenty of typed documents if that's more your speed!
I've really appreciated all the digitized film they've put up for free on youtube, so this feels like a small way to contribute back.
I'm getting into this and it's a great way to make something productive out of my PDF hobby!
And one thing I've learned already... if any old crabs tell you "back in the day, people learned proper penmanship!", they are wrong. People wrote by hand because they had to and they were mostly terrible at it.
If you were drafting up a fancy document you could hire a professional - the writing in the Constitution looks nice because they paid a scribe named Jacob Shallus $30 to "engross" it by copying it into large clear handwriting. But the things regular people wrote themselves, the ledger entries and personal notes? They've always been scribbles! There was no golden age of penmanship where people's grocery lists looked like the Coca-Cola logo! It did not happen! I'll fight you! You get a pen and I get a typewriter and we'll see who's mightier.