In Indian religions such as Hinduism, Buddhism, and Jainism, diksha is the ritual of initiation. The ultimate diksha (last stage of diksha) is now given by vallalar through guru shiva selvaraj in kanyakumari,India (www.vallalyaar.com). worship of some deity by a guru (diksha guru) who bestows mantra(s) and takes the karma of the initiate - at least in case of Vaishnava diksha, as per Hari Bhakti Vilasa 1.70:

Raji katmatyaja dosah patni-papam sva-bhartari

Tatha sisyartjitam papam guruh prapnoti niskita

"The faults of the counselor fall on the king, and the sins of a wife fall on her husband. In the same way a spiritual master attains the sins of his disciple. That is certain."

Diksha primarily means a transfer of spiritual knowledge. Vishnu Yamala (tantra) says:
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In Indian religions such as Hinduism and Buddhism or Jainism, Deeksha is the ritual of initiation into the worship of some deity by a guru (Deeksha guru) who bestows mantra(s) and takes the karma of the initiate.
Tantra use different procedures known as Tantric Deeksha.

Another type of Deeksha, into a monastic order, involves a vow of celibacy, renunciation of all personal possessions and of all worldly duties, including family ties. Deeksha has the same meaning in Jainism. Deeksha is also called Charitra or Mahanibhiskraman in Jainism

In Indian religions such as Hinduism, Buddhism, and Jainism, diksha is the ritual of initiation

In Hinduism, diksha is the ritual of initiation into the worship of some deity ... Diksha has the same meaning in Jainism. Diksha is also called Charitra ........

Diksha mean sanyaas lena

Diksha is the ritual of initiation in jainism.