Not from a place of duality, but from a place of the more who raise their vibration, the more it raises the vibration of the masses, the more it helps others start to awaken, raise their vibration. So from a place of non-duality, working on self is helping another... many others across the masses.
If you want to know how to help "others", work on clearing all of those blocks and anchors, all of those low-vibrational issues/emotions that have yet to be cleared.
It is not about one, but about all. How does one help all? By working on the one that affects the all.
So if you need a purpose, this is it. Your purpose, in this moment is to work on being the best light you can be, a beacon of love to others. And to do that, you must focus on self first. Then you will be helping others. We all are.