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?
Having less power in those centralised organisations is definitely a good thing.
Online communities are helpful, and also sometimes necessary for those who are not able to easily participate in local communities, or who live in a place where nobody is interested in the same things as them.
And still I found it much better to interact with people in-person.
Even when their interests might not align perfectly with yours, it’s just much more fulfilling than online-only interactions.