The Bour River Valley WIP

[AlexTna]

Hello everyone! This is my second map following draklingrisen's tutorial "Artistic Maps in GIMP". Sadly i could not finish it as nicely as my first map ( who had only minor mistakes due to tiredness). I tried drawing a coastal map but had no experience with water and delimitation's etc. In retrospect i believe i should have created a water layer and play around with that, but it was too late when i thought of that, so i had to skip some steps in the tutorial, add a layer, played around with the opacity of different layers to at least get a decent looking map. I could not recreate the nice, old canvas look i made the first time (and the technique in the tutorial) because of the blue water on my Background (sketch) layer. Usually it should have been deleted so as to get a white layer, that's why in the finished map you can still see the sketch marks of roads, mountains and rivers. Anyway i think i will figure this out (using more water layers probably), what i want to hear from you are other points and mistakes i have done, that i can't judge by myself. Also bear in mind that i am completely new to the software, so "high tech" solutions could be too difficult for me.
Looking forward to critique and pointers!