I'm really liking this map, your drawing style is very nice. I don't have any specific feedback on your technique and the geography looks fine to me, I don't see any issues there.

Where you go from here really depends on what you want to get out of your map-making but one logical place to go from here would be to focus on your borders and other embellishments (compass rose, scale, other decorations). Your map itself is quite good but these elements would elevate the piece as a whole. I would advise you to look through the finished map thumbnails page for inspiration and to work out where you want to take your style going forward.