I just got my first BB for my birthday/christmas gift to myself.
I have spent the last 4 days playing with my phone..I have been researching apps and games and making ringtones and trying to make Themes (that part hasn't worked so well)
I am using the VZW BB Curve 8330 and I love it already!!
Check out the BlackBerry 101 How-To Lecture Series ! This will help you with the basics such as downloading apps, themes, wallpaper, ringtones. It's also a good idea to browse the forums and read as much as possible. Many questions you have are answered there already!