I dont see how i wont be homeless one day

Im not trying to speak things into reality here. but if i stay on the current path im on, i'll definitely be homeless when my parents die. Its a scary thought. my dad often tells me i should go into the city and look at the homeless people. because thats where ill end up if i dont get a job. I cant find a job even when i try! no one accepts my resume. Im trying to get disability so i can live in a van at best one day but its a long process. my mental health is so far down the drain. im overweight and on meds that make it hard to lose weight. my meds make it so i cant sleep properly.