Realistically, I would probably wander around and draw stuff/ sketch stuff, especially the beautiful scenery, like zora's domain and faron woods. I'd still love to visit the picori world though.
I would search around until I found a portal to the minish world and spend time there. Then if I got bored I would find a shadow crystal and jab it into my head so I could hang out with all the cats in castle town. Then if I got bored again I would go to Lake Hylia and spend so much time there I...