In my haughty, arrogant oppinion, north was not the direction to settle in. I've always been a proponent of cities on the edge of the jungle, since they have so much future potential. When making choices in expansion, I always gravitate towards the warm, wet jungles and their opportunities for commerce rather than the drier temperate zones.
Specificly, I am referring to the southern horse location. The choice real-estate there is a particular spot where you can get Cows, Horses, Gold and Gems all in one spot. It also forms a vanguard against the southern desert to help you draw the line of settlement. It is 1 square away from the river, making horse-connection a breeze. It gives you Horses, reasonable productivity, commerce and a strategic position.
I can understand why you did not immedietly spring for this location, since the gold 'n gems were not visible to you for a long time due to your exploration pattern. This does bring me to an important point though:
Important point: Your first duty in exploration is to find the best possible location for your second city. This means not travelling into the far-off distance trying to meet people (don't worry, they'll come to you), this means you must travel in a circle around your start location. Once completed, your map should be a large circle with a radius of about 8 or 9 tiles around your capitol, this should encompass all of the reasonable locations for building a second city. I have had painful experiences in the past where I chose to expand in the wrong direction, away from the rich land.
As for whether a chariot-rush is in order, I would strongly recommend doing this as soon as possible. You have a strong military advantage, and an insanely productive capitol. At the very least, your chariots can stuff-up your opponents expansion and production while your heavy-troops (city-raiders) trudge their way down south for the killing blow. Thebes is perfectly capable of churning out a WC every other turn. Believe me when I tell you this: You posess the military capacity to fight and win 3 simultaneous wars with all of the other inhabitants of your continent. 2 Cities should focus on military, but after that, WCs are so cheap that the rest of your development can focus on developing the economy you will need to fund your conquest.
One final piece: You needn't bother with the Oracle if you want to conquer. The longer you take before mobilizing your army, the more likely it is that your opponents will be able to wield spears and axes against you. If your opponents do posess metal, and consequently an invasion-worthy army (so they believe), the sooner you declare war, the sooner their metal army will march towards you on the open ground, like lambs to the slaughter. Your WCs will be numerous enough, and strong enough to take down any army they can throw against you, and capitolizing on that, plunge into their territory and sever their metal. Once the metal is gone, you begin the long siege of their empire, shutting down all expansion, production and science while your heavy city-raiders march down to bust open their strongholds.
The War-chariot is not a chariot, it is an Axeman on wheels (at 72% the price!). War-chariot rush = axe-rush, only quicker (and no city-raiders).
Now, back to cities, if I want to put my money where ym mouth is, I need to show you how to fund your campaign. There is the gold/gems/cows/horses site to the south, but if that's too far off for you, there is a very interesting location.
Location: To the west of your city, on a desert tile, NNE of the copper, and ESE of the plains-cow, is a very powerful location. 3 floodplains for food and cottages, copper for your metal supply, and cows for still further food and production. As the cottages mature, they can help to offset the costs of empire, and the Copper/Cow combo will be giving you a size 3 city that can put out 8 hammers/turn while maintaining a surplus of 3F. With this addition to your empire, you should be able to eliminate most resistance to your authority.
I didn't do any spoilers here did I? I hope not, and appologize if un-intended information leaked through. My espousal of WC rushes is not from this game alone, but from battles fought in the past as well.