Litteratur
General learning resources
learn.sparkfun.com
learn.adafruit.com
Basic elelctronics
Testbench: tinkercad.com
Webguides
Voltage, current, resistance and Ohms Law SparkFun
Videos
Capacitors, resistors and electronic components TechQuickie 2:44
Presented from a computer motherboard building perspective.
A simple guide to electronic components Bigclivedot.com 38:05
A sligltly different, and more detailed, take from the british isles.