This is a great start. I just had the same "problem" too. It took until 1500 AD to clear out all that jungle, and there was only the capital and a few outer rim cities for the longest time.
Suggestions:
1) Look for overseas luxury clusters you can settle on or culture grab. (Watch for wars around luxury clusters where culture borders will shrink after conquest and drop a settler in there.) Look for overseas settler/worker factories which might have high corruption, but will grow faster than you can in your territory as it looks now, i.e. rush buy after the population has grown.
2) Try to very carefully plan and clear jungle in order of use ("one, two, three, and that's seven, and that's gonna take four and to move without a road is one more..."). Roads take longer to build in jungle, so probably clear it first, however if you build the road first then the workers can move in and chop that same turn. Generally I cleared the jungle first unless a road was really needed.
3) Try a few small wars with the purpose of capturing slave workers and also rush buy the conqured population as settlers and workers.
4) Buy workers from other civs when they happen to be in their capital.
5) Once that jungle is cleared out, you should have some fantastic land, and you may have a total monopoly on coal if not rubber when it appears (try to block other civs from any stray sources with an ROP and fortify a unit on the coal square before it can be roaded).
6) Once you can build RRs, (about the same time you get all the jungle cleared), you should be able to do so with great speed. ***Steampower, coal, RRs and workers may have a big role in your strategy in the future, think carefully about how to take advantage of that century.***
7) Seeing as you won't have much population or gold or production for a long time (everything important to "realist" stratagists) you might want to get some big culture and/or science or gold via trade going.
