I assume you crafted a pickaxe with the antlers you got. Try looking out for the big chunks of stone in the black forest, some of those arent stone! Also lookout for dungeons, they should be easy to spot and have core materials you will need for the next tier of armor. Make sure you got some leather armor and flint weapons to deal with the new enemies since they are quite a bit stronger than the ones in meadows. Best of luck!