You can get help by joining my Discord, and asking your question in the #adsb-containers channel. I'm in Western Australia so if you don't get a response immediately it might be due to time zones or sleep. There are a bunch of friendly and knowledgeable people there who would be happy to help if I'm away.
Furthermore, I welcome any feedback on this document. If you think a section needs better instructions or further explanation, or if anything doesn't work for you, please let me know through the channels above so that I can continue to improve this document.