Have some rep from me, too. As the others have said, this is a really amazing effort. Not just for a first map, but amazing period. I love the sense of perspective those mountains lend; I think this is one of only a very few maps where I actually feel suspended above the land, looking down.

The only nitpick I could muster myself to find is the river system around and in the Red Mountains. I'm not quite sure what's going on there - it looks like you've got rivers splitting and rejoining, multiple exit points of the same river system to the sea, etc.