Drone building is the maker side of FPV: instead of buying a finished quad, you solder the parts together, flash and tune the flight controller, and end up with a machine you understand down to the wire.

The reward is twofold, the build itself and then flying first-person as if you're sitting in the cockpit.

The honest reality is it's a steep multi-skill start (soldering, electronics, software tuning, then actually flying), and crashes mean repairs, so a tolerance for troubleshooting is essential.