I work in cybersecurity now, though I spent about 15 years in Systems Administration. I credit my career to my father buying a computer and letting me tinker with it. There were two factors that taught me a ton about computers:

1. Creating boot disks for games (this was back in the heyday of MS-DOS).
2. Realizing "oh shit, I had better fix this before dad gets home."

Nothing teaches how to work on computers quite like working on a computer. And much of that "working" is actually figuring out how to un-fuck the computer you just fucked up.