Learning node can get intimidating at first when you try to understand 'event loop' and 'streams'. I would suggest not to worry even if you do not understand those concept initially. Don't stop there. Move on to learn express js. Express is easy and it will give you required boost to move forward into concepts of event loop and streams. Get any beginner level express js book and create a simple website using express framework. Next step would be to learn about socket.io and real time communication.