What is the process to go through when a person passes away and leaves no will and had property but no insuran

My brother passed away recently. He had mortgages on two properties. He didn't have any insurance. He owed credit cards and other bills. My brother and I have been appointed administrators over his estate but I don't know where to start. Do I try to keep the payments on the house and then put it on the market or do we default on the mortgage and let them have it? Do I have to pay his credit cards off? What about the personal stuff in his house, can we remove it? Can we distribute it among the survivors (he was not married and had no kids but has siblings) or do we have to sale it. I'm at a lose as to where to even start. Any suggestions?