Yeah I'm getting really eager to play!
I read some parts of the manual too, but still wonder. I start with getting negative oil for example (it will decrease by the hour). To increase my oil-income I have several options:
1. Lower the need/public availability for oil
2. Build/upgrade factories in provinces that produce oil (this one i'm really unsure about)
3. trade to get oil
In the 12 hours i have played so far i found out that:
1. is an option, but your troops need oil to move, so they will move slower having an influence in your moral.
2. not possible i think, at least i have not found any upgrade production building. Production seems to depend on city moral, having a train upgrade does make it better according to the manual tough.
3. best option, if you have the cash that is.