Once you have the image on the SDCard, you should be able to put the card into your device and plug it in. If everything worked correctly, it should boot to the OEM setup. Here you define your username, passwords locales etc. Once that is done, the script will clean up after itself, resize the partition and reboot the device. After that reboot, it should boot to the Operating System Depending on the edition you have installed, this could be a simple TTY login or a graphical desktop environment.