Access a piano on your computer using websites and downloadable applications, such as VirtualPiano.net and Mac's GarageBand. Using these options, you can play the piano on your computer either by using the Internet or a desktop application.
VirtualPiano.net offers a piano with five different octaves, music sheets organized by skill level, and resources to help you locate an instructor if necessary. It is free and is one of the first and best online piano resources, available on any platform. GarageBand costs money, but it allows you to record and synthesize music using only your computer, and it does not require an Internet connection.