Looks extremely good and honestly very very nice, only critique eventually to me is that the north seems a bit faded by contrast with the sea I think...
If you want to add another I think sometime ago I found a climatic simulator that was easy and crude and not up to the complexities of the others but...
I'm a full time artist/illustrator. I mostly do freelance character works, DnD, Elder Scrolls, Wow and many others. I did masonry for about a decade before going full time with art. I've been doing some watercolor and acrylic paint works recently to get used to physical mediums again.