The spawn is on one of the three small islands. Neither of the islands got any trees which as you probably can imagine makes surviving more difficult. But don't sweat, if you look in one of the directions you should be able to see the beginning of the mainland and there you will find lots of trees.
One of the islands are kind of shallow in a way as you will see in the second image further down. If you destroy any of the sand blocks on the surface of the island the rest of the island will fall apart too.