Here's a step-by-step guide to getting your PS3 running, navigating the interface, and using key features.
On first boot, the PS3 guides you through:
The PS3's interface is the horizontal XMB. Categories (left/right):
Navigate with D-pad/left stick. X = Select/Enter, O = Back/Cancel (Japan/US default; swapped in some regions).
Enjoy your PS3! It's a versatile media hub with a legendary game library.