Hi, ruiisu - welcome to the Guild! A map in a post right on the first day you are here - that is worth a little reputation all by itself - thank you for jumping right in.

The map is a nice start. I like the sketchy version of wave lines around the coast - somehow in sections they imply movement better than continuous ones do. You can probably clear up any un-water-like behavior of your rivers by reading Redrobes' wonderful How To Get Your Rivers In The Right Place up near the top of the Tutorial Forum.