How to fix uneven skintone?

I am a medium toned (tawny) skinned black girl with uneven skintone. I looked in my car mirror today and my skin looked HORRID!!! It's hard to explain the way it looks, but I want to know what I can do to even it out. I really want to try something natural, but I'm willing to try any product that actually works! I hate wearing foundation everyday and I have hormonal acne on top of everything else so I can't just use anything. Help