Single mom in need of car

I am a single mother of a 7 year old girl and I live with my 82 year old grandmother. I am the sole provider for my family and my car just broke down. I have since lost my job due to it being 30 minutes away with no transportation to get there. My grandmother has never had a license so she relies on me to get her to and from appointments. I am currently working and life’s difficult taking care of everyone and having to walk everyone or spending so much on public transportation. I have been trying to save up for a used vehicle, it’s just hard when you are constantly paying for ubers. I just need enough to get there. Please help.