[soltakss]

I'd start with the whole world rather than a little section of it.

This map doesn't show the Sky Mountain being the center of the world, it seems very peripheral.

Nor does it show seas, large landmasses etc.

I'd draw the world outline with large areas drawn with a broad brush. That way, we can add things to those areas and they can be added to the map afterwards.

The trouble with describing small regions and drawing maps of those regions if that they become isolated and it is difficult to see how they interact with other areas.

As for the geography itself, deserts arouns Sky Mountain is fine, put seas around the deserts and possibly deserts around the seas. The Inner Desert would be very hot and extreme where only Heroes go. The Outer Desert would turn into chaparral/bush at the outside extremes but would be proper desert near the inner seas. Since the seas would be evaporated quickly there would be salt pans and salt deserts there, but the seas would also regenerate somehow.