Instead of installing Docker on your local machine, you can use Play with Docker for this tutorial.
You will need an account to use this service. Create your account at Docker Hub.
First, click on Login and select docker to login using a Docker Hub account.
After you have logged in, you can click on Start. You should now see a sidebar with a timer and a red CLOSE SESSION button along with a few other options.
Create a new instance by clicking on + ADD NEW INSTANCE. This might take a couple of seconds. A terminal should appear.
You are now ready to use Docker!