I suppose it would be mostly practical skills, cooking, fixing things. Usually had to be done by people themselves.
Maybe also mental things like navigating (with or without paper map) and remembering their daily and weekly agendas.
What other things would be a big difference with the people today?
Not entirely, my son still had to have lessons on it in elementary school for some reason.
Because it’s better to take notes by hand, and you need cursive for that. Bonus: your writing looks like that of an adult. Bonus 2: you can read other people’s writing (mostly).
I’ve been able to take plenty of notes by hand without cursive. It’s a preference, not a prerequisite.