Go by your seeking and aspiration. It is better to hear and read what you want to know.
In general, I would suggest
Glimpses of Sri Aurobindo’s and the Mother’s life.
Prayers and Meditations (prarthana aur dhyan).
Sri Maa ka Yog (hindi)
Collected Works of the Mother summary
The Mother (hindi)
Savitri yagya
Read the Mother’s writings and ask questions as and when they arise
Affectionately,
Alok Da


