Got a second turn in today.
A pod in the south gave me a Unity Foil, which will pop a couple unguarded pods nearby and then, assuming it survives, attempt to rescue my stranded Rover and Former.
At the EoT, I got my free Sea Colony Pod:
You can see here where I have decided to settle it:
I'll send it over along with two defending Gunboats and an Isle. Plus Supply Trawler. This city will serve two main purposes- first, it secures Brilliance, a resource which I have no other sources of nearby, and more importantly it will control one of the few aquatic approaches to my capital once I use the Trawler to rush a Perimeter Defense. The only other waterways to Gaia's Landing are blocked by a Spawning Site or located far to the south.
Now I badly need to research the two farming techs (farms themselves + chain irrigation), and then after that I think it's time to finally research the tech that lets me manually build Isles and Worms. Right now my biggest weakness is that I have no decent ground combat troops- even just a couple Cargo Foil's worth of Siege Tanks would mean disaster. I feel secure to some degree because my start is so incredibly out of the way for everybody else, plus the seas are still very treacherous, but that won't last. As a stop-gap measure, I intend to produce a few Empathy Flamers & capture some land Worms from the sole Spawning Spot on my island.