procedure post name change

Hi all

I want to change my name officially. Ive researched the procedure on how to change my name in india.

However i want to know the procedure post name change and how easy it is:-
Changing name in pf, ppf, bank accounts
Name change in adhaar, pan, passport, driving licence etc
Signature change

What are the procedures in these cases
Is it easy
How quickly this needs to be done