..As you progress in the chanting of the Hare Krishna Mahamantra by the mercy of the Nityananda and Gauranga Mantrarajas and the Pancha Tattva Mantra as per the chanting levels table which I sent earlier, you will gradually reach the stage of chanting 16 rounds of the Nityananda and Gauranga Mantrarajas and 16 rounds of the Hare Krishna Mahamantra daily. At such a time you can accept full-fledged Mahadiksha in the Hare Krishna Mahamantra.Though rarely seen, it is possible in the scriptures to have different Diksha Gurus for different Mantras like in the case of Parvati where she accepted the Gauranga Mantraraja from Shiva and the Hare Krishna Mahamantra from Shrila Haridasa Thakura. You can increase your daily chanting to the level of Harinama Diksha gradually as per your capacity and there is no commitment or compulsion of any fixed time frame for doing that though it would be good in one or two years if you could do that. But again that is not mandatory at all. If someone stops or criticizes or minimizes the chanting of the Nityananda and Gauranga Mantrarajas, then I would not desire my disciples to associate with such persons.