Survival Island: Above the land

Hey guys. It's my first-ever map I have ever made for the public. Hope you like it!

So, long story short: You are stuck on a floating island, and you need to get out of the island! But there is a thing: The island is surrounded by barrier, so the only way out is to go in the mines and upgrade! But the main job is to get diamonds and break the obsidian, BUT!!! There is only ONE Obsidian that you can break. Any other obsidian is surrounded by bedrock. That means you also have to find a book that contain the coordinates of the block that will lead you to the exit. Good luck! More updates coming soon!