Watch EEVblog's playlist on DC theory, and then play around with a breadboard and simulations using something like circuitjs. Get some basic tools such as a soldering iron (and solder/wick/sponge/etc), breadboard, wires, and a collection of components like resistors, capacitors, and LEDs, and so on. r/AskElectronics has a guide for all of the practical stuff you need. Pick a project you actually find interesting and work on it (after learning how to safely use your tools and components).

Lots of people get started with things like using a microcontroller to light up some LEDs and so on. That will introduce you to basic concepts like how transistors work as well if you dig into it.

https://www.youtube.com/watch?v=xSRe_4TQbuo&list=PLvOlSehNtu...

https://www.falstad.com/circuit/circuitjs.html

https://www.reddit.com/r/AskElectronics/wiki/beginners/