I think for a geography map intended to convey the terrain, this is coming along wonderfully. Is that the intention of the map?

I'm not sure on the scale of this "island", but are there enough rivers to be realistic? Also, from what I'm seeing, this is a very rocky place; although green, I imagine not many lush fields, plains, or praries; is that correct?

I would also make sure to add some eye-interest to the oceans, too. Is that in your plan?

Coming along well! Keep it up!