Does anyone have any ideas on how I can make money?

So, I've been jobless for about 6 months. No place around where I live is hiring. Well...I went for an interview Thursday at kmart and as soon as I walked in, the lady said I didn't look good enough. I mean I was dressed nice and everything, but I let it go. Like my mom says I just let people walk all over me. Anyway, I'm 18 and jobless therefore, I have no money, well I used to have some saved up, but I have to buy my own food because I eat different food than the rest of my family (I didn't lose 50 pounds by eating the food they eat). I'm a soon to be high school graduate and I have no money.
Basically what my question is, does anyone have any ideas on how I can make money? Like a small business that won't cost much to start up or online jobs? There's no places hiring right now around here, except this gas station, but you have to be 21 to work there.
Any and every bit of adivce or ideas would help me a lot. Because I NEED money. I have no food, and I'm getting to the point where I need a car beacause soon, everyone will go different ways (that's kinda sad, but I can't wait to leave!!).
Thank ya'll so much!

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