Darn. If I'd played my ALC Germany game with Bizzy instead of Freddy, I'd be more help. It sounds like you're doing what I tried, except I got so much help that I was able to move up to Monarch when I was half-way through the leaders.
I'd back up what the two previous posters have said. An Industrious leader practically begs for a Metal Casting slingshot from the Oracle so you can get started on those cheap forges ASAP. Remember that besides improving production and letting you run an engineer specialists, forges are also happiness increasers provided you have gold, silver, and/or gems. And the AI loves to trade valuable techs for Metal Casting.
The only other wonder I would shoot for is Stonehenge, since Bizzy is not Creative and is unlikely to found an early religion. The 'henge is a cheap wonder, especially with Industrious. It means you don't have to waste production turns on an obelisk (monument in Warlords) and you'll also get a Great Prophet from it eventually. Later, build Oracle in the same city as Stonehenge to accelerate the production of the Great Prophet(s).
I actually wouldn't bother with the Pyramids, unless you're playing Warlords, build the Great Wall, and use its Great Engineer to build them rather than wasting 225 hammers. That's a lot of Axemen. I usually only shoot for the Pyramids if I'm a Philosophical leader and I'm planning on running a Specialist Economy. In the early game, Hereditary Rule is usually better than Representation and more easily obtained.
As for Expansive, there are numerous benefits. First off, you can chop a lot more forests since you don't need their health benefits as badly. Second, cheap granaries! Prioritize these as soon as you have Pottery (a high-priority tech), and then start whipping. The granaries will let you recover population faster so you can whip 'em again, and the cheap forges mean you get more hammers per population point you sacrifice. Don't be afraid to be a tyrant!
The only big problem with Germany is, like America, that UU that's so late it's often useless. But if you need a late push for a domination win, it could come in handy.