This does look good for a first city map. nice layout with the islands. One of the things that is missing however, is some sort of scale. I would be interested in seeing the area that this city is located in.

I do have a comment about the docks....To me the Dock district would be a pilots nightmare. There appears to be very little room to maneuver the ships, and it would be even more crowded when ships are actually at dock. I would suggest spreading the wharfs around that island instead of concentrating them in one spot. Either that or opening the dock area a bit more. I might have the distances wrong, and that kinda points out how useful a scale would be.

Looking good though.