Setting up a Kali Linux and Metasploitable Virtual Machines
How to command-line?
While you'll notice that you're presented with a really smooth GUI on your Kali home screen, when working with Linux it's crucial to be able to use the command-line. Later down the road when you're remotely issuing commands to other computers that you've managed to gain access to, it will be through the command line not with a mouse!
As a stretch goal to work towards, you should be able to do everything you want to do in Kali only using the terminal. For now, just get a handle on the basics: