As that is a Swyama Siddha Hanuman Mantra it does not have to be chanted for a fixed range of Mantra Repetitions for being able to utilize it. Exclusive worship and rituals and procedures about direction, sitting down mat, and counting rosary are usually not proposed for chanting this Hanuman https://www.youtube.com/watch?v=ufkmD95y7fE&t=32s