Here’s a good tutorial. One thing you have to make sure to do that isn’t clear is to insert a + into the “nostr+walletconnect” string. I don’t know why, but apparently this hasn’t been fixed yet.

nostr:note1shcrq9s94vucf2alk05enluu9e9ncskw6up9s03qsu5q0sxjl4aqgzaxza