@scriptkiddie I did Occupy The Net
hackers-arise.com/about/
But for Ghidra you read the manuals lol
also there is CompTia +
comptia.org/en/
And try Hack the Box and Try 2 Hack Me.
Basis is Linux commands, so a good book about the commands of it is critical.
He injected a flawed Router (saw an article about exactly same model) decompiled with Ghidra and set arbitrary code