Hi Alpha8768
Most of the time when I help teenagers get into programming I find that javascript is a great place to start.
It is very forgiving
You do not need to compile it
You already have everything you need to play with it (a browser and a text editor).
There is a tremendous amount of resources and tutorials for free on the internet
You get instant gratification
You get familiar with concepts that carry over to more advanced languages
There are several ways to run javascript code locally on your machine but setting up a server that you can access by going to
http://localhost in your browser is a great learning experience by itself. I recommend XAMPP for beginners using a Windows system...
http://www.apachefriends.org/en/xampp.html
It contains a ton of great stuff and is very easy to set up and slowly learn everything that is there.
HTML5 Canvas is a great place to start. I have published many canvas tutorials alone and with other developers and they are very popular.
https://developer.mozilla.org/en/Canvas_tutorial
There are lots of other things to play with in the javascript world. You'll never run out of ideas.
And the extra bonus is that you'll be learning current technologies that will help you as your skills grow to maybe do this stuff for a living one day
Maybe you have other reasons for using DOS but if you are looking to learn about programming and web and mobile apps then this would be a great start.
James