After you regain control, head northwest and into the Adventuring School, a way of learning random battle information you’ll learn here anyways. But you can’t get three items from this guide, can you? So, yes, go inside.
In the easternmost room, you’ll be able to find an Ether ; in the center room, a Sleeping Bag ; in the westernmost room, a Potion . You’ll also be able to fight a monster by opening one of the other chests in the easternmost room.
Before leaving, consider speaking with everyone here for some valuable knowledge (because knowledge is power!). Also, when entering, you’ll notice some guy standing near a bucket. Examine the bucket to refill your HP and MP and remove all status effects.
Afterwards, exit the building and leave town by heading south.