There is an unreadably large amount of free content about cyber published every day.
“Whitepapers” is a common term for free reports about trends or topics in the cyber industry. Usually these are PDFs. Often they’re published in conjunction with Marketing and Sales departments to help firms be relevant or even generate sales leads, and that’s fine.
Pro tip: Downloading white papers can lead to an inbox flood, but there’s an easy solution. Since firms like to use these documents to generate sales leads, viewing or downloading them often requires you to put something with an “@“ symbol in a form field for your email address. So, you might want to create a throwaway email address, or just make up a fake one.
Try picking one paper to read thoroughly, and see where that takes you. All of these are useful: