What I Want To Learn About Computers

I can't use computers well, so of course I want to learn everything about computers. However, especially, I want to learn how to use iTunes because I think it is very useful. If I learn how to use it, I can put music into my computer, and I can put them into CD-R.
By the way, I learned how to use Word, Power Point, and Excel when I was a high school student. That is, I used them. However, I forgot how
to use them. Therefore, I think I must learn them for my future.
In addition, I want to learn how to use Skype because I couldn’t use it when I wanted to use it. It is also useful, and above all, I learned it can speak all over the world. Therefore, I think I want to learn it until I go to America, and I want to use it.
However, first of all, I think I need to learn how to use computer basically.