This guy is the best computer geek for explaining the install in step by step terms for new users, coming from Windows, on YouTube. Explaining Computers: https://www.youtube.com/watch?v=iEHr3B4KgTY
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I have explained in the Unofficial Manual how to and where to download and how to check the iso image against md5sum and SHA number. I would have preferred it if he had shown Rufus working as Balena has never worked for me. Personally I use MultiSystem for my Linux installs, but you need Linux first to use it. 
https://zoringroup.com/forum/viewtopic.php?f=6&t=13887&hilit=+MultiSystem#p60821
Video here: