Passion is about living your life with passion. What you don't know what is your passion then How to find your interest if you don't know.. which is like.. if you are doing something n want to do even if you are getting low salary.. or not any money even though you are putting efforts to achieve that and enjoying that work.. that's your passion which you always like to do..And if you are struggling something with that work then you have to taste things like.. do something for couple of months n see if you like it or not.. if not then switch other job n go on till you don't find what you love.