Auto loan

So my credit isn't that good it's not that I got like negative marks and stuff but I just don't have enough credit out there you know I've been working with some people and a lot of the stuff taking off my record so I went to James mistubishi with my wife and my wife is not a society so she has no credit I currently have a 584 so when they're in my name they said that the bank said that well first we picked out a 2021 with 14 miles from Mitsubishi mirage my car payment would have been 524 I don't know my insurance event but I make 1,962 a month 524 wouldn't have been no problem because I make about 500 a week you know my wife could have paid the car insurance I couldn't pay the car payment not a problem said I need a cosigner my wife could do it obviously think I said she's on SSI I just frustrated because I can't get nobody to cosign for me you know I mean how can you get ahead of Life on credit if nobody can help you and how can you get better credit if the banks won't work with you I mean they say well you know we are not going to finance you because you don't have enough credit but you're not going to finance me because I don't have no credit but you won't give me credit to get credit I don't understand