Hi there! I think you made a good decision on keeping your present job.^^
You asked about how to find your passion, right? Well, I have read a book that might answer your question. Bo Sanchez, the author of How To be Truly Rich gave the following suggestions:

1. Know thyself. Think about the hobbies and activities you are engaged with that makes you happy.
2. Ask yourself, How can I make money out of it?

For example, I like taking pictures of people/places. I can start making money out of it by being a freelance photographer or by selling my photographs online. And then, I also like growing ornamental fish. I can start a business by selling some of the fishes I bred or grown.

I hope it can help you. ^^