I was waiting for it!! <3'll give you a feedback :]
How to supply electricity to buildlings that need it?
Dynamills (the second building) are used for generating Powers. Make sure you always have 1 or more Powers and make sure that buildings are manned by Folks. You can man buildings by appointing Folks to them (via the dialogue window).
OK! It's clearer for me now. I thought mills were for food (as Age of Empires ^^)
Also I thought the help tooltip was for pointing something on the map so I was kind of stuck...