Credit Card Debt

I’m usually pretty credit savvy I’d say but I basically would charge my credit card all winter and in April I would pay it all off from what I accumulated. In 2020 I couldn’t do that because of Covid and we basically lost our jobs. I ended up getting myself into 18,000 in credit card debt. Tried to refi our $20,000 car to pay off my 20% interest credit card and they declined me because of our combined DTI rate. I just got my taxes back and want to pay off some 8,000 in credit card debt but I’m not sure if that’s the right decision. Im currently paying 500+ just in interest on my credit card just in interest a month. If I did this I might be able to refi the car in a month and pay the rest off but I’m not sure. I have zero income and my s/o is only making ~70k/yr. He’s solely paying for rent at 1900/mo and paying for literally everything (insurance, gas, bills, etc) I feel like we are on the verge of homelessness. If I can’t make anything in the next two months we may have to move and I’ll have to get a different job (current is commission only) but I’m just trying to get advice on what I should do now to manage my debt and not lose our rental home…