the sparkfun videos give a pretty good intro to the kinds of parts they sell. Also, if you're only interested in small hobbyist circuits, it will simplify thin

the sparkfun videos give a pretty good intro to the kinds of parts they sell. Also, if you're only interested in small hobbyist circuits, it will simplify things if you only think about DC. AC is a rabbit hole of electrical engineering and physics complexity that you may not be interested in quite yet.