I bumped into this site - https://www.cybrary.it/ and just discovered a treasure trove of cybersecurity knowledge and a lot of other cool IT and management stuff too.
After I tried out a bunch of courses, I found them to be very satisfactory. The level of detail needed are quite adequate and I picked up lot materials even more so than paid courses.
I would definitely recommend this site to anyone willing to learn cybersecurity and IT in general.
