Make sure you have a good & reliable
SD card and a proper power supply
. Archives can be uncompressed with 7-Zip
on Windows, Keka
on OS X and 7z on Linux (apt-get install p7zip-full). RAW images can be written with Etcher
Insert the SD card into the slot, connect a cable to your network if possible or a display and power your board. (First) boot (with DHCP) takes up to 35 seconds with a class 10 SD Card.
Log in as: root
. Then you are prompted to change this password (US-Keyboard setting). When done, you are asked to create a normal user-account for your everyday tasks.