If I might make a suggestion, try using this save...
http://dffd.wimbli.com/file.php?id=10241It's a succession fort I've already had going. Yet, instead of playing the fort (I know you obviously want to start a new fort), immediately retire the fort and go and create another fort somewhere else in the same world.
That way, if you ever decide to go adventuring (always the most interesting in worlds with player-created forts made by someone else, due to the ruins to explore and the artifacts one can then happen to stumble across...) you'll have somewhere to visit. And it might also make a few more types of goods available through the Dwarven trade caravan/ at Embark... (as I understand it, available Embark supplies are determined by what goods the civilization has access to- which is determined partly by active sites)
I'd also be interested to see what else you do with my world- so it'd get you another follower...
Regards,
Northstar
P.S. If you know how to edit Raws, you can still play as Humans- just edit the Raws for the base game AND the save to make humans playable. Also, you might have to create a Human "Outsider" adventurer, and retire them, as I believe there's only the remnants of one human civilization left on the map (hiding in Kobold caves somewhere). That was actually the human's own fault- several human necromancers arose, and destroyed the only major human civilizations that hadn't been conquered by Goblins. The necromancers also tried to exterminate the nearby Elves- though they failed at this...