Your inventory is where you store the goods you collect. To enter the inventory, tap the square with the three dots on the far right of the toolbar.
The toolbar is where you keep the items from the inventory that are currently equipped. You can have nine items equipped at a time.
You need to make a Crafting Table to craft more complex items. To do this, you must chop down one Wood, go into the inventory, place the Wood block into the crafting recipe blocks, and collect the four Wooden Planks. Use those four Wooden Planks, place them into the four empty squares, and collect the Crafting Table. The Crafting Table is one of the most essential items in the game.
In the inventory, the Quick Craft tabs are on the left side of the screen. These tabs show you what you can make with the items you have. Items are automatically filed into the correct slots on the Crafting Table, so you don’t have to memorize the crafting recipes. To craft the items in these tabs, tap the item you want crafted, then take it out of the crafted square under the Crafting Table.