>being ignorant of the larger world is a totally reasonable and healthy position to take.

Reasonable yes, healthy I'd debate. More importantly, if you prefer to have something of focus it would local politics, your mayor and representatives. It is often said that what happens here is more impactful on your life than what happens in national or international news. You can participate whether a new library or infrastructure is built, zoning laws, etc.

You won't see this anyway on your newsfeed so it might suit you.