Answer
The purpose of giving Diksha (initiation) in Bhagavad Dharma is to make the life of the initiate free from suffering, and to guide the soul after death toward Brahma Nirvana (merging into the formless Brahman) or Saguna Nirvana (attaining Vaikuntha).
Qualification of the aspirant: Diksha is given only to one who is sincere and serious about the betterment of his life, because if his life does not become free from suffering, the one who gave the initiation may also incur blame. The aspirant's varna (social class), jati (caste), etc. are not considered. Whether the person is a sinner or a virtuous soul is also not examined, because in the Gita the Lord has pledged that even the most sinful of persons, if he makes a sacred resolve to take the Lord's refuge, is to be regarded as a saint, because he has firmly resolved to transform his life. Thereafter, he swiftly transforms from a sinner into a righteous soul.
The process and timing of Diksha: According to Bhagavad Dharma, every moment and every day belongs to the Lord, and therefore muhurta (auspicious timing) is not strictly mandatory for Diksha. However, it is preferable to take Diksha before the breaking of the Ekadashi fast (parana), or on Dwadashi. Fasting is observed by those who have some seriousness toward spiritual life. If Diksha is to be taken on another day, one may observe a day of fasting or consume only fruits, milk, and yogurt, and take Diksha the following morning. Guru Purnima is also a most excellent day for initiation.
Daily routine after Diksha: In accordance with the Bhagavad Gita. Ritual practices should be minimal, not excessive. Renunciation of meat and fish is mandatory after Diksha.
Other matters: In Bhagavad Dharma, initiation is given only for the worship of the following deities. For devotees of other deities, guidance can be provided without formal Diksha. The six options are: Narayana / Lakshmi-Narayana, Shri Rama / Sita-Rama, Shri Krishna / Radha-Krishna. Which of these six options the devotee wishes to pursue depends entirely on his or her own preference. The mantra of that deity toward whom the devotee naturally feels greater devotion is given, because without genuine bhava (devotional feeling), rapid spiritual progress does not occur.
In this path, the supreme Guru is Shri Krishna, and His spoken word, the scripture given through the Guru, is the Bhagavad Gita. The Bhagavat Purana and Shri Ramcharitmanas are supplementary scriptures of Bhagavad Dharma.
The primary role of the Diksha Guru is to connect the devotee with the supreme Guru and to continue guiding the devotee in the light of the supreme Guru's teachings.
Before taking Diksha in this path, it is proper to know its five fundamental principles: (1) One Lord — Narayana. (2) One Scripture — Bhagavad Gita. (3) One Goal — Divine Bliss. (4) One Path — Samanvaya Yoga (the Yoga of Integration). (5) One Society — caste-free. Hari Sharanam!