Creating a black background

[stellasupernova]

Hey, I've had PS for a few months now but can't really do anything with it, I haven't had the time to play around with it. I've been having problems figuring out a few things, for instance: how do I cut out a person from a picture and paste them onto a black background, or something along those lines?

Thanks
recklesslyabandoned182@hotmail.com

 

[Tron]

Try this link for help
http://www.photoshopgurus.info/beginner.shtml