The Thorpe Sea [WIP]

[Vodak]

Hello Regional/World Mapping!
Longtime lurker/recent poster here. I've been advised that the best way to get the ball rolling for me is to hop on in and make a WIP thread and take some pointers from you more knowledgeable types.so here goes. This was a quick overland-map I made about a year ago for DnD, was in one of those situations where my group basically told me to throw something together...and so I did. If I remember correctly it was made with some random fractal generator thingy that was online, I believe it was this feller http://donjon.bin.sh/world/, and then touched up in GIMP some (and a compass rose plastered on their pretty much straight from google images). As you can see, it's pretty bad. No terrain or features, the islands are puny compared to the scale I wanted to use, nothing's labeled...and what's worse all that I have is the JPEG, and not the gimp file.
So, I'm really here for advice. I like the general shape of everything, so I think I'm going to just trace a new layer over top of that, which means I'll be able to tune up some of the horrible jaggediness of some of the coastline, but where do I go from there? Rivers, mountains, forests, towns? Or is there a better order to do things in. Anyway, any input on this POSIP would help me out.
worldmap.jpeg

[Vodak]

I've redone the borders using GIMP, (I think I should have used a smaller brush size...well the pen probably would have been best, but it frustrates me) I was able to clean up the coastlines a little bit, as well as change up some of the islands to make them less teenytiny. I kept most of the rough look on the south-western continent to make it a little more extreme and harsh looking. Was this a good idea, or should I have kept it more unified? I think I'm going to toss in some mountain ranges and rivers tomorrow, if I have any spare time.

Also, I'm sorry about the Grade-5 colour scheme, I know it's very Crayola 8 pack, but it's only temporary until I figure out exactly what style I want to go with.
thorpe.jpg

[Ascension]

I think the color scheme and heavy line would work great for a kids book or anime or something so that's kind of cool actually. Lightening the colors would make it atlasy and darkening them would make it more satellitey.