Before you enter the Forge area you need to complete the Blacksmith safety test and do a 1 on 1 training with Mr. Gary or Mr. Singleton.
Your first blacksmith project will be some Iron hooks for a coat rack. Check out the video to the Left.
Ask the Instructor for a length of square stock
You must Successfully Pass the Hook Project and two of the following to proceed to a Knife build. Leaf Hook, Steak Turner, Fire Poker, or Door Handle. (Unauthorized Knife building looses your Forge Privileges.)
Talk to Mr. Gary about the video to get your Railroad spike.