Download Raspbian

Download latest version Raspberry Pi OS Lite from https://www.raspberrypi.org/software/operating-systems/
Use balenaEtcher (https://www.balena.io/etcher/) or Raspberry Pi Imager (https://www.raspberrypi.org/software/) to install Raspberry Pi OS an a micro SD card

Headless setup

Headless enable SSH

SSH can be enabled by placing a file named ssh, without any extension, onto the boot partition of the SD card

https://www.raspberrypi.org/documentation/remote-access/ssh/README.md

Headless Wifi setup

Add file wpa_supplicant.conf to directory /boot

ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1
country=<Insert 2 letter ISO 3166-1 country code here>

network={
 ssid="<Name of your wireless LAN>"
 psk="<Password for your wireless LAN>"
}

https://www.raspberrypi.org/documentation/configuration/wireless/headless.md

Boot without hdmi attached

Add hdmi_force_hotplug=1 to /boot/config.txt

First boot

Find Raspberry Pi on network:

nmap -sn 192.168.1.0/24

Raspberry Pi 7" Touch Display

https://www.raspberrypi.com/documentation/accessories/display.html

Raspberry Pi Camera

https://www.raspberrypi.com/documentation/accessories/camera.html