Colony


Each player in the game is represented by a colony. From here, you embark on your quest for world domination. Your colony houses all of your workers, who collect resources and can be trained into military units, as well as any structures that you have constructed. You can conquer a player by attacking their colony. Until you get a Training Base, your colony is the only place that you can recruit units.
Colony Appearance
The size of a colony is dependent on the number of workers present in that colony. The more workers a colony has, the larger it is.

It is possible to change the appearance of your colony using supporter tokens (see Boosts and Bonuses)
Workers
Workers collect resources from your resource structures, and can be trained into military units. 25 workers provide 1 power. To get workers, you need to build the Farm structure. The higher level this structure is, the more workers you gain. Workers are gained every 24 ticks and is referred to as "Worker Growth". Each conquer adds 1 worker to this total, and one worker is added for every 2 resource outposts you control. For every 25 crystals your alliance controls, you get 1 worker added to the total.

isn't this what the tutorial tells you?