Computers & IT (Non-Engg)

I think the following options will be better than MCA
Through security certifications. There are a multitude of certifications based on the category or field of security. Here are a few to name:
Beginner level:
Certified Ethical Hacker - CEH | EC-Council, provided by EC-Council
CompTIA Security+ Provided by CompTIA
Medium to Advanced Levels:
Offensive Security Certified Professional - Provided by Offensive Security. CompTIA CSA+ Provided by CompTIA CyberSecurity Analyst
Similarly, there's CHFI - Computer Hacking Forensic Investigator Certification [Computer Hacking Forensic Investigator-CHFI | EC-Council] for Candidates interested in Forensics - Provided by EC-Council among many more.
2. The next approach is through attending and trying out CTF events - All about CTF (Capture The Flag). These are the perfect platforms to prove your strength and show your skills in the field of cybersecurity. People learn about computer security in a number of ways, all important. For the sake of argument, let's put these in three categories: reading, building, and doing. [Why Should I Play Capture-the-Flag? ]
A Cyber Capture the Flag exercise typically resides in the last of these three categories: DOING. CTF attempts to model the defend/attack experience. Time pressures bring into sharp focus theoretical lessons. Competitive forces exposes assumptions and flaws in tools and systems constructed in a vacuum.
3. Bug Bounty programme
A bug bounty programme, also called a vulnerability rewards programme (VRP), is a crowdsourcing initiative that rewards individuals for discovering and reporting software bugs. If finding vulnerabilities is your forte, these are for you. Here's one of the sample available list of bug bounty programs: Bug Bounty List | Bugcrowd.