The latest pre-made image of RetroPie is v4.7.1
Released November 4, 2020.
retropie-buster-4.7.1-rpi2_3.img
https://retropie.org.uk/download/
use win32diskimager to flash pi 3 image.
sudo ~/RetroPie-Setup/retropie_setup.sh
Enable ssh etc.
Chhange HostName/PW