At level 32, you shouldn't have any problem handling the caves in the Wetlands - one with spiders near the road has tin and incendicite, one on the other side of the zone full of raptors has tin and iron. You're right on the edge of being able to farm the northern mountain ridge of the Arathi Highlands, which has more iron.
As for blacksmithing, as others have suggested it's kind of a money sink at this level - you might want to just AH the bars until you have enough for your mount, then start worrying about skilling up BS.