Electronics

Books

Various info

Bad Beer Rots Our Young Guts, But Vodka Goes Well - Black, Brown, Red, Orange, Yellow, Green, Blue, Violet, Gray, WhiteElectronics Color Code
There are other mnemonics but I won't disturb your tender, innocent mind with these.

Online Resources

Electronics Class on Instructables by Randofo
Arduino Official Website
Instructables Circuits Section
Instructables Arduino Section
Raspberry Pi More educational than anything. Don't try to actually use Raspberry Pi. It's slow!

Section Added 10/11/24 Ways Electronics Can Help You

If you want to go off the grid and have electricity, you need this. Also Physics, Electromagnetism, Computer Science.
Considering how computing intensive modern life is, understanding electronics and how to fix and fiddle with it will probably be an in-demand skill for a while. Particularly if you know how to solder and have your own soldering and repair setup. This is a necessary part of computer repair for instance.
Tie this into Computer Science and you can automate boring tasks using software on a computer, and automate boring tasks using hardware in the field of Robotics.
Improve your computer rig without electrocuting yourself and with maximum effectiveness, if that's something that interests you
This is now required for repairing most vehicles along with at least a basic understanding of vehicle computers and debugging them.
Any interest in being a safe electrician requires that you know this too because of the sheer amount of stuff in modern everyday life that's absolutely full of electronics
One of the ways to get into inventing is to start with an electronics hobby. You can do a whole lot with it. Check out all the electronics stuff on Instructables if you aren't sure what I mean

Cutting Edge The latest technology. Always good to keep up with if you're into electronics.