The spawn is on one of the larger islands (also known as the one in the bottom-right corner in the image below). There are about nine trees on the island so there are a good amount of resources you can use to create tools and enough wood to build a shelter.
Surrounding the island which you spawned on are mostly water (of course) but also some more islands. One of the islands is comparably to the other ones much higher which is pretty cool.
Seed: huebr