If you click on the Dash and type: text
two programs will appear. Gedit is the one you want.

There are several free "Ubuntu Manuals" online. If you pick one and browse it,
you will find it a lot easier to use Ubuntu. In many ways Ubuntu is like
Windows, but in some ways it is almost the opposite. For example, I returned a
wireless adapter because the driver disk did not include anything for Linux. If
I had just plugged it in to my computer, it would have worked.

http://ubuntu-manual.org/