As this is the Swyama Siddha Hanuman Mantra it doesn't have being chanted for a set quantity of Mantra Repetitions for having the ability to use it. Distinctive worship and rituals and principles pertaining to direction, sitting down mat, and counting rosary will not be advised for chanting this Hanuman https://www.youtube.com/watch?v=ufkmD95y7fE&t=32s