We all at one point struggle finding our purpose, goal or passion in life. But you don't find your Passion, you grow your passion. So, your passion is liking something you do, doing it constantly over the period of time and enjoying it while doing. You don't find passion hidden in the corners but the things you have stayed and nurtured over the time. 

Quitting your job or studies to find your passion is not an answer. In fact you are building pressure of earning from your passion from the day one. In order to fulfill your passion, you should first look for stability. Instead of giving up on your job, find time in in your current situation and devote it towards your passion.