Your soul has a work to do in every life. What is your life task in this life? You figure out it already or you just don't know yet? There is no fast way to get to now our life task. And there is no use to stop doing everything else meanwhile.
Did you know that already when you was a little child you start to take steps towards your life task? Every little things you have learned in your life is helping you to make possible your task.
For example. I myself was wondering many things what I was drawn in when I was growing. Why I met certain people? Why I get certain education even though I didn't start to work in that field? And now when I have get more familiar with my life task, I can understad it. I need all those experiences in my life. In this particular life.
Same way you can find your own life task. Think what you have always like to do. Which things has been interesting in our life? Who are the important people you met? What is making you happy?
Why we should know our life task? That is what makes our life worth of living. Life task don't have to be always a new working place. It don't have to be sacrifasing yourself for some religion. It don't have to be anything huge and complicated.
Start from small things what make you happy. Learn to live in moment. Look what life is telling you, what it is bringing for you. Live your life and when you choose something choose the thing you like more, what makes you happy.
That is how you step by step come to more near to that what we can call life task.