The term: robotics was coined by Isaac Asimov in the year 1942. Isaac Asimov wrote one story, the name of the story was Runaround. And in that particular story, he used the term robotics during 1942, there was not even a single robot in this world.
In robotics, we use the fundamentals of different subjects, for example, physics, mathematics, mechanical engineering, electrical and electronics engineering, computer science. And, that is why it is a bit difficult to become true robotics.
We will have to know the fundamentals of all these basic subjects and robotics is actually a multi-disciplinary subject.
If you are interested more about Robotics, You can mail to smartsubu2020@gmail.com.