My another question is what rules, morals, behaviour and discipline Shia scholars follow because as per as I have noticed they all behave same in their morals,discipline and behaviour.
And if even I want to follow the behaviour and discipline of Shia scholars what should I do?

by

It is those of the Prophet and Ahlulbayt (a).

One good book to find out is this:

https://www.al-islam.org/ahlul-bayt-ethical-role-models-sayyid-mahdi-sadr