This is something I've played with for a while now, and I have never been sure where to go with it. So Im here looking for advice on what to do next!

This is Cere, the overworld for a set of stories me and my friends are doing.
I created it with a world generator, actually, and cleaned it up and made it look more natural. I also added the island's in the center ocean, to give it some variety.
Click image for larger version. 

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Aside from where the land actually is, I havent done much else. I think this is because I'm self taught, and I'm not sure what to do next.
Thoughts and suggestions?