You write in your CV "Want to learn C to build device drivers so my computers work like they should". Why do you want to write your own device drivers? Because there is hardware you want to use (e.g. under Linux) for which adequate free device drivers don't exist? (What hardware?) Because existing device drivers have bugs or limitations that no one has fixed? (Can you give an example?)

If I was doing hiring, the way you worded that would make me suspicious that you don't really have a good understanding of the reasons why in practice people develop device drivers. You could avoid that impression if you were more specific about a device you want to write a driver for (e.g. "I bought a Thingymabob9000, but I can't use it under Linux because only Windows drivers are available for it"). Since the vast majority of IT jobs don't actually involve device driver development, any limitations of your understanding in this area are probably irrelevant; but it is better you avoid inducing a negative impression in others even if it is irrelevant to the job (unconciously we tend to still consider things even if we know consciously they are irrelevant.) Or you could just avoid mentioning the topic of writing device drivers altogether-better to not bring up a topic on which your knowledge might have some gaps than bring it up only for the hiring manager to get the impression that you have a poor understanding of it.