You never have everything right.
Much, much better.

In this case, I think you've over-done the tile improvements, only because every city has waaaaaaay more tiles to work than they have citizens to work them. Balance is certainly better than too-many tiles to work, but as you are experiencing, too-many tiles to work is dramatically better than too few.
Make sure once your war with Washington is over to switch to commerce tiles instead of production ones (not across the board, but let's get some cottages growing, yeah?)
I can't even imagine why you aren't in Slavery and cracking the whip right now. Switch to slavery and whip in every city where it's possible this turn. The GL will be built with only 9 turns needed to add the National Epic to its scientist generating tastiness, 3 or 4 courthouses will be built as well, with lots of overflow to roll into more troops for your war. One of your whips pulls 2 citizens off 3 and 4 commerce cottages (I think) - put them back on by sacrificing hammers from forest tiles. Build 'dem cottages!
Get two settlers cranked out (I'd chop him with your forested hills by turning the trees into mines) and get one due south of your capital, 1N of the wheat. With farmed wheat and the flood plain, you can work all four hils with mines - that's a decent production city. With biology you can add a plains water-wheel and a workshop - not to mention however many miscellaneous coast tiles you can grow into for some pay-for-itself commerce. It'll never be worthy of Ironworks, but it'll make some units and a little navy for you as the game progresses.
The second settler, I approve of your #4 site. Not a good city, not a bad city, but it will be a net-gain for your civ, so get it settled.
Crack the whip, make more units to

Washington with, and carry on!
I am troubled that his territory isn't already scouted out, though - you should have explored all of that terrain well before he settled it and should know what is beyond.
Just remember that learning Civ is all about baby-step improvements - and you just took a BIG one in the right direction. Play a couple games where you develop your tiles and run a nice cottage economy - then come back for diplomatic and city-specialization help if you need it down the road.