Hi Hitesh! what you are implying here is compromising with your passion with what life gave you. That’s not what not what I meant.
@Shamita, If singing is your passion you will find your ways to acquire necessary talents. As far as Leaving your job is concerned you can not do it instantly. You need to start working on your passion area along with your current job and once you have started making some static income with it you can leave your job ..
Here are some other suggestions to help you fire your job and to pursue your passion instead:

1). Be Self motivated
Visualize yourself dong what you like doing most. Feel the happiness which you will gain by doing show. Do it whenever you get time. This will push you further towards your passion

2)meditation and solitude.
Start practicing meditation and spend some time in solitude everyday. This clears up your conscience and attach you to real you. You can realize your strengths and weaknesses. Self awareness is really important when you are planning to take your life in your control.

3) Simplify your life
Start spending less and saving more. Start leaving simpler now so that you can use the savings when time gets wrong. Some money in your account will always help you in taking necessary risks in your pursuit of happiness.

4) Start acquiring skills
Start acquiring skills necessary to pursue your dreams. Gain knowledge about the field in every respect. After all its going to be your arena…You need to be the master in everything.

5) Continue with your current job unless and until you are sure that you can continue without any income for at least a year. You need to plan properly.

GOOD LUCK 🙂