Installing Pi Zero W & Flotilla

I’m working for a library service and we’re developing two MakerSpaces. In developing the spaces and equipment / resources we’ve discovered a Raspberry Pi Zero W starter kit and a Flotilla set.at one of our other libraries along with lots of other coding kits.

I’m testing the equipment and am trying to find supporting info for install and guidance for the Flotilla Cookbook recipes but am finding it hard to even get past install on the RP imager.Got the right OS but it isn’t detecting storage to fully install. I’m assuming the storage is the SD card that comes with the kit. Unless I’m missing a step…without any instructions available as it is an older model I’m kinda winging but have got stuck!

I’m not a coder so this is fairly new but was expecting the install to be pretty basic as I need to write instructions for our library staff to conduct coding sessions with the kit that are accessible to anyone with limited or no coding experience.

Also, with the Flotilla website being deactivated there aren’t the Cookbook recipe cards - please can someone direct me where I can access these? I’ve found the GitHub with links to Flotilla code but I need something simpler to follow.
Any help appreciated!

This may help. As far as getting the Pi Zero up and running goes.
Raspberry Pi OS – Raspberry Pi

Getting started - Raspberry Pi Documentation