just watch videos on youtube read articels
watch guys like linustechtips ncixtechtips techoftomorrow and u will start learning things
just watch all the tutorials on there channels and try to find other guys on youtube its easier to watch video than reading stuff
First ask yourself if I you really want to spend countless hours trying to figure out what's wrong with a piece of hardware of software! then If the answer is yes, get your hands on some computer components and start a small project.
What kind of project you might ask? Anything thats within your reach!