Ill plug my whole sovbit.host ecosystem. (My paid relay still needs fixing on the payment side, so apologies there.) wss://theforest.nostr1.com is a great realy. Jumble is a great client for exploring relays. And I'm on Android, so I primarily use amethyst. Not really sure about who to follow, kinda depends on what you're into, but if you dig through my follow list, there is a decent list of developers and shit posters.