I want to join Indian Territorial Army. I am a graduate and currently working in a Pvt firm. I am also fit medically. Kindly brief procedure

Hi All; I am a medically fit candidate aspiring to join the Indian Territorial Army. I always had a dream to join the Indian Army but due to certain family reasons I couldn't. I am a graduate and also working in a Pvt. Ltd. firm. Can anyone pls help me out with the procedure and how to go about it?