i do robots for work (formerly drones, now self driving cars). pick a type of robot that interests you. self driving rovers, industrial manufacturing machines, drones, humanoids, underwater pipe inspecting subs are all robots with very different technologies underlying them. very hard to just “learn robots” you gotta have something in mind that you think is cool that is the direction you wanna go in, otherwise e.g. you learn inverse kinematics and it’s completely unnecessary for delivery drones, or you learn VLMs and it’s completely unnecessary for industrial robots. start with the goal and then peel back the onion. good luck!