Transfer of property after father's death

My father passed away. I am the younger daughter of my father. The house that we presently reside is registered on his name and on my name as a joint owner. My father prepared WILL and mentioned after his death the property will completely on my name and also mentioned there is no share to any of his childrens and family members. We are four of us; myself, my elder brother, my elder sister and my younger brother. All 4 of us are married and settled. Its been 2 months to his demise. I would like to know the following 1. Will my brother and sister should get the share share on the house for all 4 of us ? 2. Does the property needs to be re-registered? If so, what is the deadline before which the property needs to be re-registered as its been over 2 months since my father's demise and in whose's name it needs to be re-registered? 3. Can the property be registered in all of our names or can be registered to only my name? 3. What is the complete process involved in re-registration of the property?