I'm making a complete step-by-step build guide for people starting from zero. It walks you through every part of the build and explains why each step works, so you learn along the way instead of copying commands.
It covers choosing and buying the parts, printing the case, wiring, Raspberry Pi and ADS-B setup. At each stage you'll see what it should look like when it's working, and there's a troubleshooting section for when it isn't.
FltCast is fully open source, and everything is on GitHub if you're comfortable piecing it together yourself. The guide is for when you want to understand it and not get stuck.