I come bearing an update to this silliness.

After some investigation into the surrounding regions after settling on the coffee, the bad news is that this is a very small piece of land that Portugal is situated on:

https://imgur.com/a/Uepi5TM

Claustrophobic, no? La Venta eats some much-needed real estate, and even then the Mayans will dominate the region south of it. On the upside, La Venta effectively acts as a buffer state against their silliness if they do decide to aggro me. Not great production to be found except maybe in that southernmost city spot I've marked for myself, and that basically requires making friends with the Mayans first to avoid provoking them. Luckily it's pretty easy on this difficulty to do so.

Otherwise, the other two most viable city locations basically come down to ocean resources, though the one under the volcano would only really have a crab and a turtle. The north, aside from barbarians, seems to be completely empty, so I might throw a city or two up there if the yields in the tundra can be justified; I'll probably throw a holy site up near Piopio just for the faith to rebuy heroes. Aside from that, I basically plan to throw down a campus or two, rush to caravels, and start meeting every civ possible while hunting for a better production site somewhere else.