The folks behind the Wordfence plugin have created a new security center for WordPress that might be relevant to your interests! The site, at https://www.wordfence.com/learn/, is free to use and covers several different topics, including:
- Security threats specific to WordPress
- Phishing and other social engineering type of threats
- How to tell your site is hacked
- How to clean a hacked site
and many more. Enjoy the free videos and do let me know (firstname.lastname@example.org, as always) if you have questions!