First off, pretty decent for a first go so kudos there. The colors are good and the layout is interesting. The rivers, however, are some of the craziest I've ever seen, skirting the coasts instead of just dumping out into the ocean, forking downstream, criss-crossing, etc. I think browsing through the Tutorials section here might help ya fix those up real nicely. The mountains need a bit of work but not too much and the Tut section again will help ya out there. Your mountain style seems to be most similar to Pasis so check out his tut...his tut is not for Artrage but since it's a raster program many of the techniques should transfer over. All in all I think you can definitely go somewhere with this so don't think I'm trying to discourage you in any way...quite the contrary. Take a gander at some of the mountain tuts and I'd be more than happy to help you out further with rivers of you get stuck...just ask and I'll copy your map and draw some in for ya and you can finalize them.