You get f**king spaceships so I don't care 
Well, you don't use them all the time, actually.. there's a spaceship only in the beginning..
It's kind of cliche, you are on some kind of journey with your allies, a few enemies raid your spaceship, you gotta kill all of 'em..
You kill 'em because they're easy as shit, you get items from your tutorial NPC, you choose a job, and voila, you can start the game.