If you have any copper at all, and by that, I mean any, tools, weapons, things waiting to be sold, etc
Take it apart, smelt down the head
Then take one of the copper ingots and put it back in the smelter, and then take the tin ingot, and put it in the smelter
Now you can at least make a bronze hammer (or wait for something)
You can also search around the map, You never know when you may find something extra valuable laying around near certain areas of the map.
You could also collect the 3 crystals scattered around the map, Make the sword and get the 4th crystal and find the 5th crystal
(There might also be more ore veins...)
(There might also be more something extra after finding those.)