Definitely recommend adding a pod relay or two
Filter.nostr.wine is excellent. It aggregates public relays and filters out a lot of spam. There’s also a welcome.nostr.wine where you can see posts by newcomers.
Here’s some info: https://docs.nostr.wine/filter/readme
And nostr:npub18kzz4lkdtc5n729kvfunxuz287uvu9f64ywhjz43ra482t2y5sks0mx5sz or nostr:npub1qlkwmzmrhzpuak7c2g9akvcrh7wzkd7zc7fpefw9najwpau662nqealf5y can help if you have questions
Also, relayable.org is a fast, high quality spam filter, and I believe it’s donation-based 🤙