Independents
For your first mission in the game, you play the Independent kingdoms, released into a sector on the outskirts of the galaxy where the Empire is not very present. It is an accessible mission: you have 3 weeks, but it is theoretically possible to complete it in a single day.
The warlike side matters — you must colonize 15 or 25 planets — but you will mostly attack neutral or poorly defended Empire planets. A little resource management on your planets will get you familiar with starship production and population revolts.