Instructions
Collect several pieces of driftwood from the beach areas closest to the ocean. Walk up to any pile of two or more stones on the beach. Press "X" when you're prompted with the "Build" option to automatically build a workbench, which you can use to craft different tools to raise your mechanical skill.
Press "Start" to check the plans for the items that are already unlocked and able to be crafted, which are the bamboo fishing spear, shell axe, torch and a basic shelter. Collect the materials listed to craft these items. Click on the workbench and press "X" to select the "Build" option, and then craft these items to raise your mechanical skill points.
Press "Start" to access the main menu, and then scroll down to "Plans and Ideas." Select "Shelter" and you'll automatically build a shelter. If you don't have enough supplies, the game will remind you of what supplies you need to collect. You'll start off only being able to construct a primitive shelter, but you'll unlock more advanced shelters as you raise your mechanical skill.
Collect some driftwood from the beach areas closest to the ocean if you don't have any left from building the workbench. Press "Start," and then scroll down to "Plans and Ideas." Select "Plans" and then "Emergency Fire Hut."