>>6053
>learning OPSEC
It's not so complicated, don't disclose information which can be used to identify you directly or by deduction.
For example if you give out two parts of information in one place "I am X years old and live in X country" then next time you ask similar questions and say "I live in X country and work at X" then someone will see "aha this is the same person, they are X years old, live in X country and work at X".

That's just basic deduction, but you study this as you prefer.