Update 1.21.9/10

Since copper tools and armor have been officially added to minecraft this mod no longer adds any items of its own and is fully server side.

The only difference to vanilla copper tools is that now you really need them to mine iron ore.
Also see Other Changes.

Have you ever started a new world and spawned next to a shipwreck so you got iron and diamonds before even getting wood? With this mod you can finally enjoy the rewarding grind through the early game.

Added Items

Copper Sword
Copper Pickaxe
Copper Axe
Copper Shovel
Copper Hoe
Copper Nugget
Chainmail

Added crafting/smelting recipes for each item. Can now craft chainmail armor.
Bonus: added bundle.

Other Changes

Iron Ore now only generates below y level 32 or buried above y level 80.
Chest Loot has been adjusted to now spawn copper instead of iron and iron instead of diamonds for easy to obtain chests.
Villagers now trade copper tools instead of iron tools, iron tools instead of diamond tools, chainmail armor instead of iron armor and iron armor instead of diamond armor.
Sheep will no longer drop wool upon death but only when sheared.

Note: most of these changes can be tweaked with data packs.

Bronze Age