The best beginner robot kit is not the one with the most sensors.
The best beginner robot kit is not the one with the most sensors. It is the one that lets you build a working drive base quickly, then add sensors one at a time. A two-wheel differential robot with an ESP32, motor driver, battery holder and ultrasonic or ToF sensor is enough to learn wiring, firmware, motion and debugging.
Avoid kits that hide everything behind a proprietary app.
Avoid kits that hide everything behind a proprietary app. Beginners need visible wiring, replaceable motors and sample code that can be changed. The goal is to learn how the robot works, not just press a demo button.