Lets get going with the basics. In this game there are no mines that you need endlessly upgrade, here your main income source is map control.
Each captured sector provides basic resources on hourly basis.
Basic resources are used in construction or production.
Some basic resources must be refined first to produce more valuable secondary resources.
Secondary resources also used in construction or production of better weapons.
Once you have some weapons ready its time to train some units.
And after you have gathered some units it is time to capture more sectors.
I am leaving the rest for you to discover!