I'd certainly settle in place:
# More hammer output from the stone tile.
# More non-water tiles for your capital.
# The other clam resources are possibly next to small islands or a peninsula, when you settle such a water-heavy area, you'll be glad of having clam if there's not much else there, and then you can build Maoi Statues on a small island/peninsula with far more water tiles than your capital; your capital could do with much better national wonders anyway.
As for builds, I'd get two workboats out
as fast as possible, and forego building a worker straight away. Why?
# Building workboats doesn't stunt your city growth.
# Work those clams for the Financial bonus!
# You probably won't be in need of a warrior/archer straight away on this map type.
# That extra commerce could really help you get ancient techs quickly.
# Use your early teching power to get Masonry and Monotheism, hopefully the sea tile commerce will bag you a religion. But which one to choose? I say Hinduism, ooh, or Tao!
What about stone-accelerated wonders?
# If you do bag a religion, Stonehenge would be a great asset (culture and early shrine). Personally I'd say Stonehenge is a definite to try for.
# Pyramids aren't so critical as I imagine you'll be going cottage-mad. Still, I really like running Hereditary Rule instead of Representation if I get the Pyramids and am not going for specialist-spam; I don't know how useful that would be in this scenario though, as you may have few healthiness resources to compliment your unlimited happy-cap.
# Great Wall? Nah, that's just decadence. Of course it has a use, but on archipelago it's not that handy. Spy points would be nice for an early settled Great Spy, but that could interfere with getting a Great Prophet for your (potential) religion opportunity. Plus the wall would probably just look silly; it's visible from space, have some dignity.
# As for other wonders, come on, it's only the first turn! See how it plays out.
In summary:
Work Boats ASAP while you research to Masonry, then go all out for Monotheism while building a worker, then Stonehenge once that quarry is up. Simple!
