Workers on automate is fine for lower difficulties, but if you're playing Prince on CivIV, you're going to want to be more thoughtful. The strategic choice you face is to either go for a cottage economy which is simpler to execute on a turn by turn basis, or to build irrigation and go for a specialist economy. At this stage, I'd recommend cottages. Expert players seem to love the specialist economy, but if you're struggling, you probably just want to simplify as many tasks as possible.
You should try to shoot for a worker for each city, and you should try to make sure that every citizen is working on an improved tile (a tile with a mine, farm, cottage, or exploited resource on it). Focus on exploiting resources first, and make sure they're linked to your cities with roads (if you've gone through the tutorial you should already know that much).
I see that Wodan is looking at this thread, and he knows far more than I do, so if he says otherwise, I defer to his judgement.
Oh yeah. Welcome to Poly.