As that is a Swyama Siddha Hanuman Mantra it doesn't have to get chanted for a set variety of Mantra Repetitions for having the ability to use it. Exclusive worship and rituals and principles about route, sitting mat, and counting rosary are certainly not suggested for chanting this Hanuman Mantra. https://www.youtube.com/watch?v=ufkmD95y7fE&t=32s