The gospel of selfless action, or, The Gita according to Gandhi: Translation of the original in Gujarati, with an additional introduction and commentary

This book helped me achieve the balance, though I keep going off kilter now and then, this one brings me back on track :-). YMMV.

https://www.amazon.com/gospel-selfless-action-according-Gand...

I guess you got to keep looking, keep trying intuitively based on what you know yourself, create a feedback loop from your attempts and when you find your purpose, you will know. Good luck!