Cool, it looks like an interesting project! A suggestion (and your free to take it or leave it or do anything you want with it): if your aim is to make it look like a habitable world with seas and rivers, you might wanna try eroding the landscape a bit before you start colouring it in (Wilbur might help there). At the moment it looks like a parched, pockmarked world someone just dumped a few billion gallons of water on. Everything is filled in nicely, but there's no sign of a history of sedimentation, erosion, ... as you would have in an actual river-and-ocean world.

Also, if you squint real hard, the image starts to look a bit like a blond poodle