Go back to the church and surrounding area and look around for a key. That key opens a locked door you passed earlier before the bridge drake and leads you to the next area you should tackle. Level up your equipment before you head out because you won't be able to access a blacksmith for a while. You can skip the entire area if you want but it'll rob you of a lot of the game, and some especially memorable bits for new players. --- A man chooses. A slave obeys.
Before bridge drake. As R1 said you'll enjoy the game a lot more if you explore it blind. The next five areas lead into each other once you get started down that path and after finishing those the whole world is open so you probably won't need much reference. --- A man chooses. A slave obeys.