what I learn about computers

Now I think I will buy a new computer which will be started to be sold in 31st of this month. It will be my own. I am studying the system of computers but I can not figure out that well at all. I am searching the wards of computers, for example, RAM, Hard Disk Drives, etc. I think it difficult that I remember that since it is pretty complicated. Complicated is my favorite song, which Avril Lavigne sings. I am still at a loss what to say while I talk to shopkeepers as to the computers.
And I prefer typing the essay to writing it. I would like to have a good command of the blind touch as soon as possible.