Looks very good for a first CD3 map. The layout is very nice and i really like the hedges around the fields.
But there are, of course, a few things that could be improved . The city walls have the same width as the standard building, reduce it. Also the dropshadow of the towers is too long IMO. Oh, and there are some weird house shapes, mostly near crossings. Try to avoid that. For me it is helpful to have an eye at the scale in the CC3 prompt. Also use the distance tool to get a feeling of proportions.
Have some rep for your first map and welcome to the Guild!