you need to SSH into the Pi and run:
cd RetroPie-Setup
chmod +x retropie_setup.sh
sudo ./retropie_setup.sh
This will start the setup script, then choose the ‘setup’ option and follow the instructions in the first link
you need to SSH into the Pi and run:
cd RetroPie-Setup
chmod +x retropie_setup.sh
sudo ./retropie_setup.sh
This will start the setup script, then choose the ‘setup’ option and follow the instructions in the first link