Did I do this correctly? Getting error message.

Here's an example of a relay that uses artificial artificial intelligence (i.e. human intelligence) to build a curated feed of potentially interesting notes: https://relays.land/spatianostra
You can probably access its feed by clicking on wss://relays.land/spatianostra if your client supports relay feeds, or use Jumble: https://jumble.social/?r=relays.land/spatianostra
Did I do this correctly? Getting error message.

It's wss://relays.land/spatianostra but if your client doesn't support showing individual relay feeds yet, connecting to it won't make any difference. If you want to explore the feed to see what a community-curated feed looks like, just click on the Jumble link. It will take you right to it.