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?
Dialing in a TV station, with the different bands and antenna tweaking. Then keeping track what and when your shows come on.
Balancing your checkbook.
That’s what younger siblings were for. Holding the rabbit ears or turning the antenna mast.