It is quite possible for you to do Sadhana at home and in the midst of your work―many do so. What is necessary in the beginning is to remember the Mother as much as possible, to concentrate on her in the heart for a time every day, if possible thinking of her as the Divine Mother, to aspire to feel her there within you, offer her your works and pray that from within she may guide and sustain you. This is a preliminary stage which often takes long, but if one goes through it with sincerity and steadfastness, the mentality begins little by little to change and a new consciousness opens in the Sadhak which begins to be aware more and more of the Mother’s presence within, of her working in the nature and in the life or of some other spiritual experience which opens the gate towards realisation.
Ref : The Mother with Letters on The Mother