Scaled and subscribed. There's a lot of other languages and other topics that I don't know much about on All. I'm sure that they're useful, but I don't understand it and I can't meaningfully contribute to it. Subscribed is more curated and therefore more meaningful to me. The key is to be lax with what you subscribe to. Seek out niche communities, and subscribe to communities that may not perfectly fit your interests - you want to diversify your feed, so subscribe to basically everything that you'd be ok with seeing.

Then, sort by Scaled. Hot has a tendency of pushing all the big communities to the top and burying the smaller communities, so you'll just get a ton of news articles in your feed. Scaled will normalize for community size and make for a more diverse feed