As this is a Swyama Siddha Hanuman Mantra it does not have to generally be chanted for a set quantity of Mantra Repetitions for being able to use it. Distinctive worship and rituals and guidelines with regards to way, sitting down mat, and counting rosary aren't proposed for chanting this https://www.youtube.com/watch?v=ufkmD95y7fE&t=32s