Welcome to the Guild Craig. That's a very nice start, a very clean style. I like your choice of colours which are not over saturated. Only a few comments / questions at this stage: What sort of scale of map are we looking at? Are you planning to put in other topographical features apart from woods, mountains, rivers and habitations? Perhaps delineating the deserts and the frozen wastes with different overlaid colours (with a bit of transparency so that the underlying green unites everything) might be an idea. I find that putting in a subtle texture to land and perhaps the sea (even in maps of this sort of clean style improves them vastly), a slight noise would do - give it a try and see what you think. An underlying texture might help the mountains not look so isolated as they currently appear. If you are using photoshop type software to produce this, one idea would be to create a layer of noise over the green and then use a mask over it, making the bits of noise around the mountains less opaque. It would help to know what software you are using if you'd like more comments / advice (although I'm no expert).
One final comment, one usually expects boundaries to follow natural features like rivers and mountains. There may be good reasons why yours do not in your game world, but it is worth considering.
Enjoy your stay at the guild, there'll be many hands here to help you improve your map making skills.