Can my older brother act as executor of our mother's estate before the will has been probated? He and my siblings are forcing me to move out now.

I am a 54-year old, college-educated woman who is disabled and lived with our mother for 42 years. I was primary caregiver to Mom in hospice the last 5 years before she passed May 19, 2019. My five older siblings were essentially absent the past five years. Our house has been emptied of all but my room, bathroom, kitchen, garage, and patio, and everything, including most of my furniture and belongings, is in a 10x20’ storage unit to which I have no key. They say they plan to sell the house and use that money to find me a place to live, but they are giving me no information. I have been ordered to be out of the house by August 10, but I still have no place to go. I can’t afford a lawyer. I’ve tried Legal Aid (which rejected my request for help, because I would not tell the receptionist all my siblings’ names and SS# over the phone). I believe my siblings are all acting outside the law, and I’m afraid I will be the loser, but I can’t secure legal advice. I’m scared.