There are many ways to learn Data Analytics. They could be free or paid. If you are a beginner, you can start by going over the free content available on the internet. That could be free courses, blog posts, YouTube videos, tutorials, etc.
Once you cover the basics, you can enroll in a good course from a recognized training institute on Data Analytics. The reason for that is you can learn from industry experts along with getting good guidance. Getting mentored in the best way is essential in building a successful career. Enroll in Data Analytics Course from IIT Madras through Intellipaat and become a Data Analyst. Here I have attached a video of a customer who enrolled in a Data Analytics Course and has successfully completed it.