Hardware & Networking

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.

This is very good idea. Jetking's courses are designed in such a way where not only students are job-ready from Day 1, but also taught the most in-demand technologies relevant in the near future. These courses drafted after extensive discussion with the industry and direct inputs from the core HR teams to make them the most industry-ready programs in country today. Jetking offers various career and short term courses as under:
1. Career courses: JCHNE+ Cloud (12 months) and MNA+ Cloud (6 months)
The eligibility criteria for above courses is 12th and graduation respectively. Here MNA+Cloud 6 months course is most suitable for you.
2. Short term course: Exchange Server 2016 (38 Hours), Networking Essentials (68 Hours), MCTS Windows 10 (70-697) (36 Hrs), Operating system support (68 Hrs), PC hardware support (68 Hrs) and Windows Messaging Specialist (110 Hours).

The minimum age should be 21 years. Since CEH certificate is given by EC-COUNCIL, they have their own set of rules. According to EC-Council, here are the eligibility criteria for joining any Ethical Hacking course:
Candidates should have passed 10+2 level examination from a recognized board. The eligibility criteria might vary from institute to institute. So, students must check the same before applying for the course. The basic knowledge of computer is must for the course. Joining the Ethical hacking course after completing a Diploma or degree in computer Science or IT would be highly beneficial as it will help in better understanding of concepts related to programming, networking, servers, security protocols, etc.