Topic for the next one thanks. You can't really break anything by trying out new relays (there are some trust and privacy implications). Play with them.

Most clients (except dog shit primal) Will let you change your relays.

The only client I've used that offers a toggle on and off of the outbox model is Yana. 

My favorites:
Nos.lol
Sendit.nosflare.io
Wot.utxo.one
Relay.Nostr.band (unfiltered for search)