We've found islands that are abundant with metal, certain islands are abundant with only 1 resource.
I.E. We've found an island with bundles of 4x10 crystal spawn nodes [40 crystal nodes]
We've found an island with bundles of 2x8 tin metal nodes [16 metal nodes]
We've found an island with a temple, and those weird mobs
We've found an island with a natural water source.
No island has everything fit for survival, the game makes you hop between islands and trade within your exploration alliance. Bring a couple boats on your metal expeditions is my recommendation, this game is not solo friendly AT ALL, but it does make it easy for a solo to join any company very easily.