Thank you so much!

Is retro pi already installed or do I have to install retro pi separately after I flash the SD card with the software image bellow (found in the MintyPi lite blog post).

https://www.mediafire.com/file/l68ogqex ... 0.zip/file

So I just started putting my mintiPi lite together, and I am having a hard time finding what I am supposed to do software wise (what should I download to the Sd card since I am pretty unfamiliar with the raspberry pi 0 w) Could someone help me or direct me to a step by step way to do it?