Indeed, it's hard to discover small websites. While building https://Cloudhiker.net (like Stumbleupon but modern), I collected a few hundred of those websites and people love them!

Also, clicking trough web rings (yeah they still exist), you discover a bunch of cool sites from strangers all around the world. I joined Indie Webring (https://xn--sr8hvo.ws/) and Fediring (https://fediring.net/) a while ago.

Edit: oh almost forgot. I have a few hundred links in my personal bookmark archive at https://bookmarks.kovah.de