1. Download and install DWARF as described here.Do not forget to enable sheep and bar and all other applications you wanna play around with (when you configure, my commandline is: ../configure --prefix=/home/sandor/dwarfBuild --enable-sheep --enable-bar)
2. to test your installation: go to the bin directory and execute: ./run-servicemgr localsheep
3. now you should do the DwarfMiddlewareTutorial
4. then the DwarfUserInterfaceTutorial
5. Go back to the localsheep and play around with it (changing needs and abilities via DIVE for example => see the world through a sheep's eye

If you feel brave: install for windows: DwarfWindowsTutorial