Yep – otherwise, everything you did looks correct and appears to have been successful… so you’re close!
The links to the release notes of the various images can be found at https://hub.libre.computer/t/ubuntu-22-04-1-jammy-lts-for-libre-computer-boards/20 if you need them.
I generally do interactive installs before I go headless, so I can’t speak to pre-configuring and such; but others have documented their experiences in those threads.
Good luck and enjoy!