Very good first map Creios, I particularly think you did a good job with your coastlines. The only improvement I think you could make to those same coastlines would be for the lines to not be as sharp. At this image resolution the pixelation is starting to become visible. Possibly a 1 or 2 px gaussian blur effect made to the coastlines would smooth them just slightly so they blend in better with the softer feel of the rest of the map.
Second, the only other suggestion I feel I could make (I'm not much of a regional map-maker myself) is to make sure that icons that represent the same things are similar in size on your map. On the left side the trees are significantly larger than the trees on the right or the deciduous trees to the north and south, which I feel looks out of place. I would suggest settling on an icon size in-between the two and sticking with it for your all of your trees. Also you could try clumping the trees together rather than having them more or less evenly spaced out. I don't know if it will look better to you or not, but it might be something worth trying.
Once again, very good first map. Your parchment texturing is excellent also. Keep it up and thanks for sharing!