You have a roof over your head and food to eat. The rest of your problems are kind of self created. You let your mom and step dad bother you, you don't need to. You should really try calling your brother, not texting. If he lives in town or closer to a town, you could get yourself a job. Or you need a serious heart to heart talk with mom and stepdad, no getting irritated or angry and no blame games. Tell them you desperately want a job and get back on your feet but how do they suggest when you are twenty miles in the boonies with no transportation? Do they have two cars? Could you make arrangements to "rent" one? How about a loan in writing to get some cheap transportation. Let them put it in their name if you have to.
Your only real problem right now is transportation, everything else comes together if you can solve that. How about finding a job as a tow truck driver or some other job where you would have a company vehicle?

I think you need to not assume you know everything about my situation, it's a rather complicated one that isn't a simple fix 😏 also, I vent on here so don't take it exactly as anything else. I don't really have much of an outlet at the moment and am trying to get through a tough time without digging myself deeper by having a meltdown. There's things weighing on my mind and heart right now that are particularly dangerous and it requires a bit of careful and considerate management.