The Sadhana is not a complicated one and can be easily performed. The mantra has to be chanted 14,000 times in a specific period. This is left for the Sadhak; he can perform it as per his wishes and spiritual development.
When 14,000 chants are completed, the Sadhak has to offer Dashansh Havan; it works to 1400 offerings of Milk to the Havan, while chanting the Mantra.
Other than this there is no other requirement for the Sadhana. I would advise you not to perform such Sadhanas and Prayog half heartedly or just for the sake of it, because such Sadhanas are most powerful and the Sadhak has to be sufficiently spiritually developed to understand what he is doing.
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