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