Another good one, actually better, is --> https://www.privacytools.io/
A good resource on basic sec/priv is --> https://www.deepdotweb.com/jolly-rogers-security-guide-for-beginners/ As far as gpg, This is a bible --> https://riseup.net/en/gpg-best-practicesThere are many others, but these are the best I can recall now. If you have good related links please do paste them here.
