I think I would not try for the Oracle. A second worker, then warriors and settlers.
I'm not entirely sure about the dotmap. Is there a unit available to scout the coast for seafood? Site B looks food-limited. Dry Wheat is only a four food tile, and that's assuming Isabella doesn't culturally steal it from you. Perhaps shift B one space west, onto a plains hill and gaining 3 flood plains (each a 4 food tile) instead of the Wheat? City A is currently claiming two of those flood plains, however, which is why seafood would be ideal. Of course, you probably won't have the option of B unless you're planning to settle it before the Copper; Isabella will move in before you get a third city up, I expect. I'm looking at shifting C one west, too, to pick up some hills and make it a pure production city.
With Isabella so close, at least you won't face lots of barbarians.
peace,
lilnev