I'm actually familiar with Ceramic (and its mess of a documentation ^^).
I don't think you'd need any particular implementation at the wallet level, just the capacity for the wallet to sign messages to verify the DID. Unless things changed, I know that they made a big refactor but didn't look into it yet.
PS: Happy to talk further on our Discord
Pretty much. All we need is an interface to the DID and we are good to go. Will talk more on discord.