Information Technology

It is very straightforward, but not easy. You should learn in an effective general way like you would study any other subject.
Pick study materials of an appropriate level, do not rush things. For example, pick a book on programming language like Python for beginners, take a MOOC course and practice a lot as you learn new material.
Read a few books on different topics like programming languages, networks, web, OS, databases, algorithms and data structures, GIT. This will set a good base for you.
After you read a few books and practice all that you will know yourself how to continue, what to learn and what's the most efficient way for you.
It's really straightforward, but takes time to become good at it.
Keep learning new languages like every year or so, and master at least one.

Big Data Analytics is the Best Career Move, mentioned below are some of the reasons :
1 Soaring Demand for Analytics Professionals
2 Huge Job Opportunities & Meeting the Skill Gap :
The demand for Analytics skill is going up steadily but there is a huge deficit on the supply side
3 Salary Aspects:
Strong demand for Data Analytics skills is boosting the wages for qualified professionals and making Big Data pay big bucks for the right skill. This phenomenon is being seen globally where countries like Australia and the U.K are witnessing this Moolah Marathon.
4 Big Data Analytics: A Top Priority in a lot of Organizations
According to the Peer Research Big Data Analytics survey, it was concluded that Big Data Analytics is one of the top priorities of the organizations participating in the survey as they believe that it improves the performances of their organizations.