OK it sounds like you have beaten the first boss.

Get the best foods you can, probably neck tail and cooked meat. Honey if you found a bee hive.

Scout for carrot seeds. You need to make a cultivator to plant them. But in order to refine metal you need cores from black forest crypts.

Finding black forest crypts for cores is probably your first needed tasks.
You can make a fire inside a crypt. Also the crypt entry inside cannot be attacked. So you can hang out by the exit and kill what comes up and back off to heal when you need to.

Once you have 5 cores you can start to make charcoal ... build up a supply of charcoal then break down the kiln and make the smelter to refine the metal.
6 copper needed for forge
10 tin needed for cook pot
Make bronze for cultivator so you can plant better food.
With the cook pot you can use raspberry and blueberry to make queens jam. A decent early food for going into more crypts for cores. Also make an ax for cutting fine wood, so you can build portals and get around easier.

Leather armor is fine if you are careful. Normally I will scout out areas and get cores from crypts before beating the first boss.