According to me, the best way to learn Selenium is, take an online Selenium Training Course and study it properly get a good industry to recognize certificate in it and then all set to get a job and start earning a decent salary. But before starting any Training program first learn a programming language out of Java, Python, JavaScript, C#, PHP, Ruby.
Once you know the programming language then you can take up following Selenium certification training by Intellipaat which is the best selenium training program in the industry.
Intellipaat prepares you to take up a job in Selenium by training you in that way and also assisting in getting the job.
Once you complete this Selenium course, you will become ready for the Selenium jobs available in the industry. I am also sharing a video tutorial, which you can watch to learn Selenium.