Gruß Gott aus dem Steigerwald!
If you want a quick entry into excellent but easy mapping, try Fractal Mapper 8. You can download a free demo version (doesn't print or save, but otherwise complete) and the complete tutorial (PDF, also free) at http://www.nbos.com .
If you're interested solely in dungeon mapping, also take a look at the demo version of Dundjinni at http://www.dundjinni.com .