Instal Libreelec problem on sd card


My vim finally arrived today

I looked through the forum but it was confusing without clear updated instructions for me to understand

Can any one help me and explain steps to install kszaq libreelec on the SD card and have dual boot

Thanks for your time

Thank you very much
After reading in the forum for some time every thing was sorted
My only problem is no sound on GUI, Any ideas what caused that?sound in video is normal