Inherit Property Without A Will

My mother father jointly held One Plot and Residential Building on it, I have one more sibling and I am unmarried, My father is not interested in making will and he is not in position also because of his illness, I would like to know what is the procedure to get Property transfer in name of my mother, if any untoward incidents happen, till I found that Death Certificate, Legal Heirs Certificate From Thesildar, and Relinquishment from Other legal Heirs and Applying for mutation to local authority is required, But in that event my brother not agree then Can it be transfer with Family Settlement Agreement ? Even Property is held Jointly By My Mother but actual sub division is not possible for whole plot, So, How it will be done? Or in that case separate mutation will be issued? Except this, just mutation is enough or something to be done at SRO office, because if subsequent sale,How SRO will know that property is now transfer in Name of Mother for remaining 50% part(in first case) or Remaining 50% In Name of MySelf ,Broths and My Mother?