Career

It completely depend upon the career you want, to be very specific I am talking about career and not job!
If you want to have a career in the field that you are already in, depending upon your area of interest, you should surely go for MCA or MSW.
When it comes to MBA, MBA is more about the lifestyle than anything specific, it is a generalized course that teaches you to work hard and survive in the corporate in the sector. Your specialisation will decide your specific sector.
You being from computer background can surely go for operations.

If you are interested in banking line, then you can choose government jobs exams.

Hello Priyanshu, Fire and safety is a must in every industry. In fact all industries have to employ trained personnel for this job. Hence I feel that there are enough opportunities for employment after you do this course.

I would suggest you to first complete your studies, and side by side you can join some class for singing. You can further go for a Bachelor's degree in music. Bachelor's programs typically contain courses in music theory, music history, performance, conducting and composition. A college degree is not often mandatory to become a professional recording artist, but can provide helpful instruction in the form of music courses and one-on-one guidance. You might also consider enrolling in a programme at a music conservatory or completing private lessons with an established musician.