Computing has a large range. Find something you enjoy, that you're interested in, and look into that. If you come across something you don't understand (which you will
, research it. Find out what it means.
If you're interested in building your own PC, look at videos of how to do that. If you have an old, battered PC, take it apart, see how it works. I liked Neweggs videos on building a computer, which you might find useful for learning about the different parts and such. It is quite a nice video if you're new to computing: