To go to the top or bottom or a webpage/word document/list/just about anything in windows, you use ctrl-home and ctrl-end respectively. Since people described to you the object navigation keystrokes, I'll just add that the concept behind it is very much like the one used by VoiceOver on Mac OS if you've ever used it. The way JAWS handles screen review is that it asks the video card for the current snapshot of the screen, which is then used by the JAWS cursor. So then the screen looks just like a webpage with text and controls running from top to bottom without any hierarchy being shown to you. NVDA also has this feature if you switch the review cursor to "flat review" mode (can you see why it's called flat?). In normal object navigation mode, NVDA skips the video card and instead asks the operating system for information about controls and windows. Every control is part of another, IE a list item is part of a list, which could be part of a property page, which could be part of a dialogue box, which is part of the application window, and all windows are a part of the Windows desktop. So that's how a typical hierarchy looks like. So, as you move between objects, you can enter an object (like a list), to look at the list items.
Hope that helps you somewhat. Here's you hoping you can succeed in your switch, because IMO it's very much worthwhile.
<Insert passage from "The Book Of Chrome" here>
