I've had a look, and like I thought you're going to want to start in 1861. You start off with four brigades instead of one, and more than three times the population. You'll also start with enough prestige to make you a secondary power, three factories you probably don't want, and some great tech.
-Queue up Empiricism for the research points and prestige, then Realism and Impressionism for more prestige. This should allow you to maintain at least secondary power status.
-You'll probably have enough troops and infamy cap to annex Johore, Brunei, and Bali as fast as possible.
-A furniture chain in one state will be your bread and butter as you will absorb lots of timber and tropical wood. Maybe skip the lumber mill at first as it uses way too much timber.
-Perhaps build just liquor factories in the other states. Skip the glass and just buy it from the world market. Korea seems to be the future target for more coal, via conquest or sphere.
-The colonial race for New Guinea and Borneo is crucial, maybe build up some research points and start researching Machine Guns on January 1, 1870.
-Also, I would make a quick mod to your game to increase wool demand for POPs. Having half your country unemployed is a bit ridiculous.