From the bonfire at firelink mosey towards a well, there should be a path round there leading uphill. Got a few basic soldiers on it and a big bridge-ish thing at the back. Up the hill and some stairs, thru a tunnel, and uve arrived at undead burg. I know there a dood that throws firebombs along the way so be watchful of that. Just be careful, assume everything can annihilate u, and u should excel.