In order to collect stone and coal, the next staple resources, you will need a pickaxe. Your first pickaxe will be made of wood; not very durable, but until you collect some stone, which is why you need a pickaxe in the first place, it's all you have.
You will need at least five planks to make one wooden pickaxe. Use your crafting table by right clicking on where you placed it. Your crafting table view is similar to your inventory view, except you now have a more useful 3x3 crafting space. First we need to make a handle for your pickaxe. To do this, pick up a stack of planks and place one above another anywhere in your crafting square. Two planks produces four sticks
To create your pickaxe, you'll have to make some new planks. Once you've done so, you will have to draw the pickaxe with its components iby placing them in a T formation, in your crafting square. Other items are also crafted in a similar way.