One thing to consider is that if you look carefully to the left of the SW Bonus Grassland and SW of the hill, you can glimpse a coast... My first move would be to send the worker on the SW BG and see if it's really a coast (salt water), a lake (fresh water) or some wicked tundra. At this point the mini map can help us figure out for the tundra too. It should be a desert tile NE of the north plain too. If it's fresh water i would plot the city right away. If it's salty..ack, either i would move on the grassland W to plot a coast city or i would move SE to avoid having a (useless) sea tile in a non copastal city. Actually it looks like a challenging start but not a desperate one. So bad you did not keep the save.