As this can be a Swyama Siddha Hanuman Mantra it does not have to be chanted for a set range of Mantra Repetitions for with the ability to use it. Exclusive worship and rituals and guidelines pertaining to direction, sitting mat, and counting rosary usually are not proposed for chanting https://www.youtube.com/watch?v=ufkmD95y7fE&t=32s