I am not sure what you mean by life purpose. I think we all have multiple, varied, complex purposes in our lives.
But I can see why you might wonder about that subject. You are a double Pisces, with Jupiter, co-ruler , in your 12th house. So dharma and cosmic principles are a personal priority. An idealistic love of humanity and a bent towards mysticism does not necessarily clarify your life path, in a specific way.
With Venus in Pisces, sitting right on the Ascendant, and a Mercury/Sun conjunction trailing behind, your persona is awash in Mutable Water energy. Questioning and pondering is the way you operate.
It can be very helpful when you are wanting to get to know someone, and to understand their issues and to be able to sympathise with them. But it might be overwhelming at times, for you personally. It is hard to have clear boundaries between yourself and others when you are so empathetic and compassionate and vulnerable.
You are very young and have plenty of time to figure out your dharmic path.
In the mean time, you can figure out how to get along with others in personal close relationships, in spite of your retrograde Virgo mars in the 7th,k opposing your Sun, Moon and Saturn.