Stuck on what to do (car repossession)

My car needs lots of work done , the driver side door has a huge dent . Front bumper needs fixed , ball joints , rotors, tires, so it’s been sitting and I honestly haven’t been starting it up the way I should be . I’m paying $290 a month, I was thinking of getting it put in the shop and start driving it again. My pap thinks I should let it get repossessed and start over . He says I’ll just have more interest . Which I cannot afford . I only make $13.25/hr I can barely even pay the $290 for the car and rent . I’m thinking if I do that it’s going to be harder to get another car , it’s going to take longer because I cannot save because again I don’t make enough money paying bills and saving for a car . And what’s the point of letting this car go just to get another car that’s going to cost me money . He thinks it’s not worth the money to fix it up he says it’s going to cost about 3k . I’m thinking just buying the parts and going to someone I know to fix most stuff for cheaper and all the major stuff like the dent in the door and inspection go to a shop .