Not hard. I accept money and give it out on behalf of my Lords and Ladies, I mean, employers.

Yes. We do it using computers now, so a lot of what I do is more database management but the basic method we use for accounting has been around since before the year of our lord 1300. All the stuff we do is just to make it possible to do at scale.

I spend most of the day in a room looking at humorous public announcements from people all over the world until someone breaks the communication system for the organization and exile criminals and bad actors

I work in a trade school and apprenticeship has been around for ages so I think it would translate. I would just say that I help teach apprentices along with their masters, specifically about boats and ships.

I help shops with their inventory.

"I make money by typing things in modern typewriter."

Im a process auditor, so they would probably understand but would think my job is not necessary ( can't blame)

Doug Stanhope, the comedian has a good bit about the mexicans taking your job, then you must not have skills! Learn by pantomime: "Crank Crank?" "Si! Crank Crank" https://youtu.be/FOt03BNPExo?t=2220