So, we've found magma. I'm working on getting the metalworking industry going. I'll likely run out of time.
Annnnd now we've got a goblin attack. The military didn't stand a chance without proper equipment. Drawbridge is closed. We'll need to draft a new force and get them equipped. Luckily metalworking is underway now.
For the next leader:
F4 will take you to the smelting area. F2 and F3 are chokepoints on the way down there, in case something goes terribly wrong and you need to lock the doors.
Weapons and armor are going to be a priority. Maybe dig out a room inside for the military to train so they don't go up against the hordes completely untrained.
Most pressing concern right now, I think, will be making barrels so we can keep drink stocks up. Might be worth making an expedition into the top cavern to harvest some wood. I've also dug an empty room to the north that should allow wood to grow too. We'll also need to come up with a solution to dump refuse without access to the outdoors.
Here's the save
http://ge.tt/8cbJtd4