This tutorial series has covered A LOT of topics. JavaScript is a powerful language. It doesn’t take much time to learn, but years to master. There are a couple of things that you’ll need to learn, but these are things beyond the scope of this tutorial.
If you’re wondering where to go next, then you should check out a couple of frameworks. If you’re interested in front-end work, then check meteor.js, ember.js or undersore.js. If you want to do server side programming, then check out node.js and check out express.js for a framework.
If you have any questions, then please feel free to comment below and I’ll answer any questions you have. For great documentation on JavaScript, then go here.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference