You should make a clear plan on what you want to do in the future. Here are the possibilities.

Further study abroad: (GRE)

If you want to study abroad make sure you have the required financial backing. Even if you choose places like Germany where the tuition fee is minimal, you will need to pay a huge amount of money because of the cost of living. After that select the universities that you want to take admission into. Find out the admission process, required fees, prerequisites, etc. Then you can filter out the universities where you have the maximum chance of getting admission. Then start your preparation for GRE/TOFEL. You can take coaching, or study on your own. Once you get your GRE score, you can start your admission process. 

You can go for further studies abroad, even if you don’t have a decent GRE score. There are many alumni of Dr. MGR University, who have successfully completed their masters from abroad and working there. Get in touch with them for inputs.

Further Study in India: (GATE)

As an Electronic and Communications engineer, GATE is a great option to get admission to the top-rated universities in India. To prepare for CAT, you can either join good coaching or do self-study. You will find good study materials for GATE online.