what does "good results" mean? i'm not being obtuse - these are real questions at the heart of it.
i don't think the idea of "global" makes a lot of sense for an open, permissonless protocol that constitutes a decentralized network. there is **only** personalized and points of view.
the best way to fake global in a pov-based paradigm is to choose - from YOUR pov - a highly connected or highly trusted node (or many) and use them as a sort of preview for a new user. whether that's a "good result" will depend on whether or not you and the new user have similar preferences and taste. you can't get away from pov. say the "global" preview was overwhelmingly bitcoiners, or movie piraters, or cat lovers or christians - this is going to be determined by whose follow and trust pov you select: same networks, many different ways to look at it, none of which are objective nor without point of view and curation - after all, this is the entire point of follows, right? personal curation of the firehose.
that's not even mentioning yet that an unknown number of relays may be online and very active yet solidly in a blind spot for you and everyone you're following. the idea of "global" runs out of legs to stand on in light of that extra wrinkle.
...longwinded, sorry, but the upshot is - in my personal opinion: lean in to these facts and be transparent about them. clients, services and onboarding experiences can and should (and necessarily must) be opinioinated and somewhat scoped. any kind of search, filter, recommendation or other curation definitionally has to come from some "curator's" point of view and lens. so make this clear in the ui/ux. use your own or a "celebrity's" as an example, but understand the defacto centralization and influencer consolidation risk involved.
my current favorite approach: however someone found a nostr service, the pov could be seeded with that referrer's network. it's natural, unsurprising to the newcomer, and incentivizes curators to emerge. a friend sent a link: you see stuff you'd expect, knowing your friend. a programming blogger includes a link: you see things you'd expect from a programming blogger. someone who makes it their personal goal to **grow nostr DAU with gereral appeal to a wide audience**: you'd see something of a "global", if they're doing their job correctly!
there are a lot of gaping holes in that approach on a tactical, operational level, but i think the spirit is correct