On this particular map, the entire look is very rich and textured, which works in the sense that it's 3-D, but not in the sense of being an authentic, hand-drawn map. Many objects have different textures, so this appears to be "paper art" in which someone cut & pasted a bunch of different swatches together, one in the shape of rivers, another for forests, etc. I would perhaps keep one texture as the background "map paper" & have it be the underlying texture viewable in each layer. (In Photoshop, set the layers atop it to "multiply" blending mode).
There's also a discrepancy between the hard & soft lines, which adds to the cut-n-paste feel: the farm fields & the houses are hard, the river & forest edges are soft. I would choose one or the other so the entire map holds together. I myself would choose hard lines, since I really like your buildings, the overwhelming texture is very soft already, and hard lines would allow more detail (which could eliminate some of the "cartoonish" qualities of the current incarnation)-- but all this is just my opinion.
Hey, great start & keep it up!!