How to use the new version of iTunes?

My computer installed the latest version and whenever I plug my iPod or iPhone in it never shows up on the homepage? And it doesn't even show my playlist folders?

When you plug it in, you will see it appear on the right side, click on it and it will give you options along the top of what you can do and see, the last one on the right will show you the music in it.

Something went wrong during the update, just sync your iPod. When you open iTune, with the iPod connected to it, notice at the top right corner a small rectangle it reads Devices, click it, your iPod you be display.