this is my very first time attempting sourdough. I used the machine dough making method and then shaped according to the tutorial on this site. I used the steam method to bake in a fan forced oven. The bread tastes yummy especially the crust, very chewy. But the bread is dense and I think the holes are too big and too few. Also parts of the crust caved in. I feel that maybe I didn't prove the dough for long enough - 3 hours. I also may have used too big a bowl to prove the dough which didn't let it rise enough, not sure - any suggestions?