Explore the Vikings' Cove. It's full of new and exciting people to talk to. Just to get this out of the way, DO NOT take yourself out of Mini form. You'll simply have to put yourself back into it if you do. So, for now, just stay as-is. In the initial room, be sure to explore the right side of the room to gain access to a secret room below that with a Spark Dagger in the treasure chest. Behind the wooden door at the top of this room is an Inn and Item store if you need them. Otherwise, go deeper into the cove.
Go left here and down into a semi-obscured passageway that leads to another room. In this room, you will find a Viking Axe and 3,000 Gil. Then, go back to the previous corridor and head right. Find the cannon going into the water (you can feel free to shoot if off, if you want), and backtrack towards the Moogle there. Then, go slightly left and walk south into the wall. Another secret room will be revealed on the other side, this one containing a Blizzara Spell, Fira Spell, and Thundara Spell