If your dad left behind an immovable property, then you have to obtain letters of administration from high court
For that you have to file a petition
The legal heirs will be served notice to submit their objections against the grant of LA
If no objections are received then the LA will be granted departmentally
Under the LA, the appointed administrator has to execute and register transfer deed in favour of legal heirs to transfer property of deceased as per law
If there is a Will then a probate petition has to be filed and probate grant obtained for the Will
Getting LA and probate are expensive procedures. Depending on market value of estate, max court fees of up to 75k has to be paid. Other costs include lawyer fees, clerkage and out of pockets