Haven't looked at the game, but thought I'd share my advice about isolated starts on Prince/Monarch. Personally, I love isolated starts...you get to expand at your own pace instead of rushing to beat the AI to critical resources. Of course, the downside is finding yourself in a tech black hole when you finally meet other civs. But you're not there yet...
1) Founding at least one religion is *crucial*, since you can't inherit one from your neighbors. You got Conf, so that's good.
2) Early cottages, as others said, are also critical. You want them to mature just when you need commerce the most. BTW, 60% is not bad at all...I've run myself all the way down to 40% before consolidating. It's ok to overexpand a little bit, because those extra cities will pay off more the longer they exist. (In fact I've sometimes expanded to the point where I was down to 20% science and still losing money...that was tricky! Don't recommend it...)
3) Did I mention that early cottages are critical?
4) Frankly, I never bother to beeline Optics. The AI civs always seem to get that tech first anyway, so let them find you first. Then, trade for it. However...do NOT trade techs with the first AI who finds you, because he's almost certainly the tech leader at that point, and you don't want to enrich him. (He may also be everyone else's worst enemy, too.)
5) Lack of happiness resources will be a big problem, so research techs that give you those...esp. Radio/Mass Media, for Eiffel Tower etc. Also go for things like Education (Oxford) & Economics (Wall Street...or is that Corporation?) -- science & commerce are far more critical than military when you're isolated.
6) Don't forget the cottages...did I mention cottages??
7) Kinda late for this, but for future advice, you should pick and choose Early Wonders that will help you the most. Best ones are Stonehenge (cheap & easy to chop-rush, but don't bother if you're a Creative civ), Parthenon (excellent for a Philosophical civ like Kublai), Great Library (easy to get first if you beeline Literature, but don't wait too long) and The Hanging Gardens (often ignored by the AI, so you can get it even if you delay researching Mathematics...but again, don't wait too long.) Alternatively, you can try for Great Lighthouse/Colossus if you have lots of coastal cities; and if your capital has very high prodution, lots of trees for chopping, AND stone nearby, you might even take a shot at the Pyramids. Most importantly, you need to pick one or two Wonders, maybe three, to aim for and just forget all the rest.
8) Cottages!
9) I did mention cottages, didn't I?
10) In 3960BC, check the Top 5 Cities screen to see who your competitors are (good idea for any game, whether you're isolated or not.) If you see lots of Industrious civs, then you might as well abadon all hope of building Wonders and focus on something like religion instead. If you see Spiritual civs, then forget about religion, or at least try to beeline one ASAP.
11) You probably won't ever catch up in tech unless you beeline the Internet, or do some very, very shrewd trading. (Watch out for the WFYABCA glitch...)
12) Don't forget the cottages!!!