@rasterman the longer you play the game/the more enemies you defeat, the harder the enemies get. those enemies drop horns and stuff with higher attack values though. you have to keep up with them. i'd suggest going and unlocking all of the great fairies so you can start upgrading your gear.
@rasterman i think the first great fairy quest you can actually accomplish is in the west somewhere, iirc. you'll find a midget named maestro.
@rasterman it should have marked where the other fountains are on your map
It was towards the North, near Eldin, I think.