You could become an expert in Big Data Analytics or master it by gaining more and more experience by attending conferences, workshops, etc., wherein industry experts gather and give out their industry know-how. These insights will prove to be very useful for your career path. If you are planning to master Big Data Analytics, I would recommend you enroll in Big Data Analytics Certification by E & ICT Academy IIT Guwahati in collaboration with IBM.
Here the same industry experts come together and teach the subject through live sessions, resolve your queries through 1:1 doubt clearing sessions, make you work your brain through assignments, and help you grasp the subject through projects. Watch this below video where a learner who enrolled in this course shares his honest opinion about the course.