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4 things are needed. Mind you everyone has a slightly different version but it depends on individual definitions of self enquiry etc
Destroy past tendencies. How? By developing new better habits of not getting angry etc. Takes 12 years for each new habit to be cultivated.
Self enquiry – better known as Nidhi dhayasan this is NOT about the mind creating an imaginary self ( which is what people do. Read about Atman. Imagine what it is Iike and think they are doing self enquiry). That’s a joke.
Control of breath. :. More likely control of prana
Associate with enlightened person. This is the highest. Best and most important. But difficult to find someone, harder to recognize and hardest to remain surrendered to them
Bhavin