The MC doesn't do anything special in the prologue. It is all about meeting the town, meeting the people, and setting the scene.
Give him time, remember that he's the "Hero" of basically a Ghost Town!
But yes, I can understand it is frustrating he doesn't do "hero's" work. After Chapter 1 I plan to change the tutorial part of the game to show the MC a little bit more in-depth before he reaches Sealed Town.