I'd love to help bring this to life, but I have a lot of other things on my plate and can't commit to it right now.
It's a beautiful concept, but currently it seems like it's still an early stage (from what you've posted here, at least). I'll pose a few questions here to get you thinking about how to elaborate on it further, should you want to do so:
Is this a simple garden-type Age, or is there more to it? Are there puzzles to solve (for instance, how to get to certain islands the player can see but not initially reach, e.g. Todelmer)? What is the history of this place? Was it a D'ni-written Age? Was it public or private? If private, whose was it and what purpose did it serve for them? What kinds of life inhabit this place? There are plants, and I see some flying animals. Did people live here? Do they still?
No need to share all the details, of course. These are just to guide you in development of the Age. It's possible you won't use all of the answers, but having them in mind when designing helps convey a depth of place