Hi, Everyone my name is Karla and I'm a paramedic here in crazy California. My brother told me about Crackberry. I use my Blackberry all the time in my line of work!
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!