The short easy way to launch notes from #nostr into fedi or bluesky. Frist run one or all of these relays for fedi https://image.nostr.build/b5d6b8f76f3579bc2bdfd6cc14557c78a0cd5737d23d173274819550d454162b.png Then run this relay for bluesky wss://relay.momostr.pink and follow @Bridgy Fed for Bluesky @tigs Let me know when you get it done and I can test it from the other side. It takes a second for stuff to travel and not everything sends yet. It might need an account to follow you (that will be me). If any of the relay sets dont broadcast the notes wont go. Use Nostrudel to see if they were sent.
I threw the four relays you listed into primal on phone. Have followed the nostr and bsky bridge fed. Might find me at @tiigs.bsky.bridge (?) Getting this error mostly though on the MOSTR bridge. https://i.nostr.build/mlqQG.png
When Bluesky bolded you can only sing in with invitation and it was really bad. After that they send you an email you can use without invitation. I've never used it. #Nostr is one of the best ✊