My mother was working part-time at 70 years old and recently lost her job. I live on a very fixed income but would like to help my mother plan for retirement. She does not want to talk about this because she has no money saved and knows I have very little money. She is embarrassed and gets angry when I try and talk about her future. I don't know how to help her.
I would give your mother some space to get used to her new situation. Just drop the issue unless she raises it. Find other ways to spend time together, even if it's just for a lunch or dinner...just mother and daughter time.
In the meantime, list what you think are all her bills and financial obligations and decide if there's any way you can help with them. In addition, if FL has an elder law agency or state or local agency for elders, contact them to find out what services they offer, and what benefits might be available to her - i.e., protection against electrical shutoff, food benefits, etc.
You might be able to get similar information at a local senior center.