It’s only in Indian scriptures that can help us in extracting our truth in a profound manner.
Full detailing of step by step process is their which one can use to find and get established in SELF.
Beautifully it is expressed in Bhagwat Gita, Ashtavakra Gita , Avadhuta Gita , Panchdasi , Buddha Sutras , Teachings of Ramana Maharshri ,Jeewan mukti Vivek .
What all is required is discipline and practice. Once knowledge is established then path of concentration is required.
At the end surrender of remaining body and mind , that’s it one has reached at the abyss of the heart.