Ray, the project is very simple. All you need to do is order a raspberry pi from Amazon (I recommend the Canakits which include a housing, power supply, and SD card), and then just use any old computer to “clone” the SatNogs SD card image onto the SD card. After that, everything is the same.
If you start by buying something like this (you’ll also need an SD card, I use 16GB ones):
Then come back here, we can walk your through the setup. Also note that you’ll need a monitor and HDMI cable, a keyboard, and an RTL-SDR dongle to finish the setup. Then you’ll need an antenna and coax, too.