I have one doubt. If person has not accumulated any good sanchit karmas.
Will he still get blessings simply by worshipping mahadev with water and milk?
Gita 9.16 says (Swami Nikhilananda translator):
Whosoever offers Me, with devotion, a leaf, a flower, a fruit, or water--that I accept, the pious offering of the pure in heart.
It is purity of heart, of intentions - offering out of love, not for begging of something - that is important, not what is offered, that makes the difference.