"There is no auto-attack here; you must always choose to attack."
As you rank up your skills through a trainer and you eventually get a real light saber, your movements become swifter and surer, and the attacks' choreographies are longer. When I chose to become a Jedi sentinel (a damage-dealer) track versus the tank-focused guardian), I gained a second light saber to dual-wield, and at lower levels my character retained the skill in her main hand while holding the second light saber lamely in the other, save for when she awkwardly used her sole dual-wield attack. It's a small but welcome detail, showing that Jedi Knights aren't born knowing perfect technique.
All this happens as the Jedi completes quests given by the various NPCs scattered around her starting planet, Tython, and later the planet Coruscant. Without giving too much away, I found the Jedi knight track to be less action-oriented than many of the other classes, which is appropriate since the other Jedi you encounter say things like, "there is no emotion; there is peace." The Trooper class story, for instance, starts off faster, but the Jedi knight's story has a great payoff toward the end of your time on Tython. Read on