This is very nice. Good colors and an interesting look. The left side might be seen as empty and wasted space, but I think that the busyness of the main area with its plethora of dots and detail is usefully balanced by having a expanse of calm blue sea. While there are certainly features that could be added (scale and compass aren't really necessary, the castle provides a rough sense of scale and one can assume a convention to map orientation, while a key and some name labels would more valuable additions), it stands as a fine work as it is.

Oh, and welcome to the Guild.