As this is the Swyama Siddha Hanuman Mantra it does not have to be chanted for a set number of Mantra Repetitions for with the ability to use it. Distinctive worship and rituals and rules pertaining to path, sitting down mat, and counting rosary usually are not recommended for chanting https://www.youtube.com/watch?v=ufkmD95y7fE&t=32s