Back home, dive off near the Statue of the Goddess and go through the doorway at the base. In this room, insert the Amber Tablet into the altar to create a electric yellow beam of light, rising from the surface below to indicate the hot and dry Lanayru Desert.
Anything else to do? Well, you can buy some more Adventure Pouch slots or Extra Wallets at Beedle’s. What I must implore you buy is a Wooden Shield or use an upgraded form of it - it is not a requirement, per se, but it is a great aid.
Anyhow, finish up any other business you deem necessary, then fly off on your Loftwing. Go to and drop into the yellow beam of light to the southwest.