All I do is charge batteries, blink LEDs and make magic smoke but its fun. There are heaps of introductory electronic pages on the other side of google. The way I've done iit s pick out a simple thing like, say, a battery charger using an lm317, find a circuit diagram and breadboard it. when you have it right and understand how it works move onto to another project. I've only ever learned something through practical application. Reading alone just goes in one eye and out an ear.