I've only scrathed the surface, but I'm already hooked. Event hough I haven't even fought a single detailed battle yet

I like the look of the complex building system, but I'm having a hard time coming up with a building strategy as I just can't get an overview of the possibilities.
I've looked online and ingame and I just cannot find any way to browse all available buildings/building chains.
Is there a building list/guide hidden somewhere that I don't know about?