"well in order to develop for the n900 you need to download and install this program or that software Python, Qt Creator, PyQt4, and Eric IDE (all of those are optional and only required if you want to run your apps on your desktop as well to test them. All you really need is notepad.). start off with something simple like 'Hello World' and get your feet wet. there is a lot more info on basic programing tools at www.whatever Here, here, Here, Here and here."

This is by no means a comprehensive list.

How's that?