As this is the Swyama Siddha Hanuman Mantra it doesn't have being chanted for a set amount of Mantra Repetitions for being able to utilize it. Specific worship and rituals and regulations about route, sitting mat, and counting rosary aren't proposed for chanting this Hanuman Mantra. The Mantra will start https://www.youtube.com/watch?v=ufkmD95y7fE&t=32s