The first time you fix something yourself, everything broken starts to look like a puzzle.

Objects stop being sealed once you have had one of them open. What looked like a single solid thing turns out to be parts joined in ways somebody decided on, and a fault becomes a question of which part and which join. That shift is permanent, and it spreads to things you have never taken apart.

Keep the next thing that breaks instead of replacing it straight away. Look up how it works before you look up how to fix it. Even a failed attempt shows you the inside, and that is most of the change.