What is the best way to learn RPA for a beginner?

It is good to see that you are planning to learn RPA. Right now, the demand for RPA is huge in the market. There are various ways to learn this technology, but if you are a beginner, I suggest you go with instructor-led training. For that, have a look at the video below. This video provides a brief understanding of RPA concepts and also it has covered some interview questions at the end.