Going back to your previous overview map for potential city locations:
I would probably settle the location with the red dot next. It has a dry corn in the first ring (one that will be immediately irrigated upon reaching Civil Service tech) and two coppers in the second ring, including one that's on flat ground and won't affect the city's food surplus. Those are 2/4 and 1/5 yield tiles, some of the best that can be found anywhere. Even better, the city also sits in a fertile river valley and has 7 grassland river tiles that can be cottaged. In other words, it's a location that can provide very good food, production, and commerce as needed. You could also alternately settle one tile east, to get the sheep tile in range to share with the capital, but that drops the corn into the second ring, and I don't think that's ultimately worthwhile.
The yellow dot would be my next target after that: it has its own dry corn resource, it shares the pigs tile with the capital, and it has a gold resource for happiness and strong early game commerce. None of the non-river locations in the southeast look as appealing to me. If you plant these four cities, you'll have a dense interlapping core, with both copper and horses connected, and very good economic potential from all of the river grassland tiles and gold/gems resources. At that point, see what the other teams are doing and go from there.
I would probably settle the location with the red dot next. It has a dry corn in the first ring (one that will be immediately irrigated upon reaching Civil Service tech) and two coppers in the second ring, including one that's on flat ground and won't affect the city's food surplus. Those are 2/4 and 1/5 yield tiles, some of the best that can be found anywhere. Even better, the city also sits in a fertile river valley and has 7 grassland river tiles that can be cottaged. In other words, it's a location that can provide very good food, production, and commerce as needed. You could also alternately settle one tile east, to get the sheep tile in range to share with the capital, but that drops the corn into the second ring, and I don't think that's ultimately worthwhile.
The yellow dot would be my next target after that: it has its own dry corn resource, it shares the pigs tile with the capital, and it has a gold resource for happiness and strong early game commerce. None of the non-river locations in the southeast look as appealing to me. If you plant these four cities, you'll have a dense interlapping core, with both copper and horses connected, and very good economic potential from all of the river grassland tiles and gold/gems resources. At that point, see what the other teams are doing and go from there.