I'd hope for the next launch to keep all 33 engines lit, and achieve stage separation. If they manage to light the Starship and not blow it up after stage separation, that's bonus.
That said ... I'll defer to what Elon Musk lays out as success criteria.
Agree. Elon doesn't appear to be shy about failing forward and learning as he goes. A characteristic of history's great inventors IIRC.