I am trying to get register as a citizen and i wondered if anyone could give a simple explanation to how the democracy games work?

I suggest you read this Welcome sticky (http://forums.civfanatics.com/showthread.php?t=202823). All you need to do to become a citizen is post in the Citizen Registry (in the main forum), and then you can catch up! Luckily, we're still in the planning stages, soon to start the game, so you haven't missed anything.

I have read that but i need an explanation of whos controls what? the intractions between different bodies of government stuff like that.

That's what we're in the middle of deciding. We've passed a Constitution which defines mechanisms that the people can use to make decisions. Now we have several debates and polls going on to determine what the structure of the government should be.

To be a little more clear, were still deciding on who controls what. Although it might help if someone writes a brief history of how the last demogame worked. That might give newcomers an example to try and understand.

Something that might help us noobs get oriented would be a simple checklist. Enumerate all the things that need to be done before play actually begins. Update the list periodically to indicate things that

have been decided
are being polled
are being discussed
have had no action so far

The game startup process can be found in this thread (http://forums.civfanatics.com/showthread.php?t=204509). I appended an updated on where we are. :)