Build 2 workboats, then a warrior and setttler ASAP. Settle your second city in a high-production site.
Once you have the second city taking care of your military needs, you are free to work all the seafood, spam workers and settlers, and run specialists.
Whipping is NOT a good idea, you need all the citizens to be happy and productive.
I'll agree with the "No Whipping" with two exceptions. It's almost always okay to Whip a happiness building. If you build a Temple for 1 turn and then whip it, you get 1
from Whipping and you get 1
from the Temple. Your population also goes down 1, so you have a net gain of 1
until your population grows back.
Obviously, you can choose to just build the Temple normally, but with this much food, you will grow the city faster than you build the Temple. The other benefit to whipping happiness buildings is that you keep your population a little lower which means your city grows faster and you get to have the buildings in your city faster. That means you can run that Priest specialist. A Priest specialist will give you as many hammers as a Grassland Forest without giving you any of that pesky food. You also get the cash and the Great Person points, which is not such a bad thing.
One other time that it would be worthwhile to whip is for Settlers and a Library. Settlers and Libraries cost 3 population each to whip, so grow to 6 population (even if it means having
people in your city) and then Whip the Settler as soon as you can. Trading 3 population for 1 temporary
and a Settler or Library is an extraordinary bargain. You can regrow the population in no time flat and you get the Settlers and Library about 1.3 Zillion turns faster.
Whipping 1 population point at a time is a recipe for a
disaster.
Whipping 3 population points at a time is an absolute monster in production advantage and is well worth the small amount of
that you get in exchange. Don't whip for anything smaller than 3 population unless you are in a truly desperate situation (i.e. Whipping an Axe when there is a barbarian at your doorstep).
One final thought: Build a Trireme after they are available and park it near your Capital so that you can fight off any Barbarian ships that come wandering by instead of losing all of that lovely food.