Raspberry Pi OS is the recommended operating system for normal use on a Raspberry Pi.
Raspberry Pi Imager is the quick and easy way to install Raspberry Pi OS and other operating systems to a microSD card, ready to use with your Raspberry Pi.
Find help with installing Raspberry Pi OS on your Pi in our online Getting started guide.
Click here for basic examples to help you get started with some of the software available in Raspberry Pi OS
Click here for more detail on Raspberry Pi OS
Click here for information on some fundamental Linux usage and on commands for navigating the Raspberry Pi and managing its file system and users