Back up anything important you have just in case. You don't want to fuck yourself. It's not going to format your HD, so everything you have will be there. There could be compatibility issues with some programs though.
They aren't just opening the door to everyone though, it's being rolled out. It could be a few days before the installation pop up shows up. You don't have to update when it shows up, you can wait until you are ready/want to see how others do.
Bookmarks