Horrible facial skin.... please help!?

I have horrible skin - I am light skinned, black, and have blackheads, some pimples, acne marks, and fine facial hair. My nose has blackheads, too. I have tried Proactive (it irritated my skin) and AcneFree. I use Cetaphil now and apply witch hazel afterwards and then a cream with Benzoyl Peroxide in it. I admit my diet isn't what it should be, but that's due to my living conditions (no fridge). I do take vitamins though. I am also not able to get to a derm b/c I am on welfare's medical coverage and all of the derms around me don't take it. The ones that do have offices too far and I have no way to get back and forth. So I am asking for those that KNOW to give me a regimen. Water, I know, but what else???? Please help. I sing and wanted to go on American Idol when it comes to a city near me (Philly) but not like this....