As this is a Swyama Siddha Hanuman Mantra it doesn't have to generally be chanted for a set variety of Mantra Repetitions for having the ability to utilize it. Special worship and rituals and policies regarding path, sitting mat, and counting rosary are certainly not proposed for chanting this Hanuman https://www.youtube.com/watch?v=ufkmD95y7fE&t=32s