Need a car but have bad credit and low cash on hand.

I have been working to clean up my credit so I could get a car in the next year or two. My transmission went out yesterday and now I’m car-less and (from my perspective) not in a position to get a loan or even financing. I’m 26, I don’t have much debt but my credit is 580. I was adopted and don’t have family that can help. To top off of this I just left a job to start delivering with my car. Any advice?