To fish, you need: the fishing rod (in a hut), the hook (to the right of the huts outside), the earthworm (return to the Bantak at the beginning and look at the bottom of the tree). Everything is written on the scrolls!
Ah... that means I already have everything. Thanks for getting back to me!
Thought I needed to combine the fishing rod, hook and fish first. Initiation puzzle is interesting, nice one!