There is already a bit of good advice what to do, here is what not to do: You already wrote that you don't think you have what it takes for it, but I want to stress: Don't try to make money as an online creator, on Etsy or similar. Basically everything popular with a low entry threshold is overcrowded and will only pay out if you put in massive amounts of time and effort AND are very lucky. GoFundMe is similar, it's probably not worth the effort if you don't already have a big reach or good hook.

You could try OnlyFans with a clever approach. Don't go for the obvious. Think feet or worn underwear. Alternatively you can go donate blood and plasma in some places for money. You can sell your hair if you keep it in good condition. In general I'd say get scrappy: Food stamps, discounts, free wifi only, decrease your spending wherever you can. And keep looking for better jobs. There is always a better job somewhere.

When you're living in a corporate hellscape you might as well be a survivalist. See how far you can take it. If you are dependent on your car for you job, maybe you need to move into your car and get rid of your apartment. Get a gym membership instead for showers. Research living on the street, frugality. There is a lot of valuable information online. You are not the only one going through this.

As for the mental part: Pretend you're Mad Max. If your survival depends on it, you're not far off. There is no shame to struggle in the this system. Concentrate on your survival. If you're at the bottom, you can only go up.