There is no better way to learn about robots and electronics than building your own things. Adafruit has shared a guide that shows you how to build your own Bluetooth controlled robotic light switch. It uses CircuitPython running on the Feather nRF52840 Express and Crickit FeatherWing to flip the switch with a servo motor. You will need a 3D printed actuator, mount, and case.
The instructions for this project are available here.