Performing Upanayanam, the sacred thread ceremony, involves the following steps:

1. Selection of an Auspicious Date: Choose an auspicious date and time for the ceremony, preferably consulting with a priest or astrologer.

2. Ritual Purity: Prior to the ceremony, the boy undergoes a purification process, including a ritual bath and wearing clean clothes.

3. Ganapathi Puja: Begin the ceremony by invoking Lord Ganesha, the remover of obstacles, through Ganapathi Puja. Offer prayers, flowers, and fruits to seek his blessings.

4. Sacred Thread Ritual: The main aspect of Upanayanam is the tying of the sacred thread (Yagnopavitam) around the boy's shoulder. The thread symbolizes the commitment to learning and spiritual growth. The priest guides the boy through the ritual, including the recitation of sacred mantras.

5. Guru Upadesha: The boy seeks the blessings and guidance of a guru (spiritual teacher) during the ceremony. The guru imparts knowledge and wisdom, initiating the boy into Vedic studies and disciplines.

6. Homam and Offerings: Perform a homam (fire ritual) where offerings are made into the sacred fire, accompanied by the chanting of Vedic hymns. Offerings such as ghee, grains, and herbs are made to invoke divine blessings.

7. Blessings and Celebrations: Family members, relatives, and guests offer their blessings to the boy. A celebratory feast is arranged to share the joyous occasion with loved ones.

It is important to note that specific rituals and practices of Upanayanam may vary based on regional customs, cultural traditions, and family preferences. It is advisable to consult with a knowledgeable priest or individuals experienced in conducting such ceremonies for accurate guidance and instructions based on your specific cultural and religious background.