Should I quit my secure job to pursue freelance physics teaching?

Ans: If you are working in the Central Armed Forces, do you have any work tenure contract or can serve notice and resign... In that case first design a proper resume which mentions your skill sets send it to potential employers directly go to company websites there in careers apply.

Corporate and Professional Security Agencies would need your profile.
You could also look for a fitness coach job in high end gyms or sporting teams.

The call is yours based on what's right!

Ans: It's natural to feel conflicted about whether to pursue your passion or stick with a secure job, especially when considering factors like job market volatility and personal abilities. Here are some points to consider that might help you make a decision: Consider the balance between pursuing your passion for control and robotics fields and the stability offered by your current government job at a PSU. Think about what will ultimately bring you more fulfillment and satisfaction in the long run. While the job market for control and robotics fields may have some volatility, these sectors also offer opportunities for growth and innovation. Research the demand for professionals in these fields, the potential for career advancement, and the types of companies or industries that are investing in automation and robotics technologies. Reflect on your interest in the control and robotics fields and your desire to learn and grow professionally. Pursuing a master's degree in these areas could provide you with valuable skills, knowledge, and experiences that align better with your career aspirations and interests. While age can be a factor in career decisions, it's important to prioritize your long-term career goals and personal fulfillment. With good financial support and a willingness to learn, you can overcome any perceived limitations and make meaningful progress in your career. Assess the potential risks and rewards associated with transitioning to a new field versus staying in your current job. Consider developing a backup plan or exploring part-time or online learning options that allow you to gain skills in control and robotics fields while maintaining your current job security. 

Assess the potential risks and rewards associated with transitioning to a new field versus staying in your current job. Consider developing a backup plan or exploring part-time or online learning options that allow you to gain skills in control and robotics fields while maintaining your current job security.