The first thing you learn is the operating system. This is a must, and it's not just about simple operations, but also about really knowing how the various links are connected.
Operating system to learn well on the choice of a language to practice put, high understanding if half a year on the small achievements.
Additionally recommended to use some of the network of small software, which can be in the early stages of your increased confidence.
The really good stuff still have to write their own, well, not to give you some nagging, I wish you success
(I'm free, so I'm dark)