What should I study on my own to become a data scientist?

Hi,

I am beginner in Data Science and machine learning field. I am searching for the tutorials to learn:

What should I study on my own to become a data scientist?

Try to provide me good examples or tutorials links so that I can learn the topic "What should I study on my own to become a data scientist?". Also tell me which is the good training courses in Machine Learning, Artificial Intelligence and Data Science for beginners.

Thanks