I was only wondering... is there a reason why the city seems to avoid the main river? Excepted in the case of swamps, people would build along a river for the easy access to water as life necessity and as trade route. Moreover the bend in the upper left-hand corner would be ideal as natural fortification.

Or maybe you planned to have the city on a hill overlooking the river and the surrounding flatlands, the better to protect itself? Then the river bends would make perfect sense... Or maybe I should just let you go on with the tutorial and keep my comments for later

Good luck and have fun in your experimentations!