I lived this for years.
First, you'll want to look into government disability support. The specifics will vary wildly depending where you are, but it's probably your most useful resource. For me, along with the money, they had tailored support for finding work I could do.
They ended up finding me a part time, WFH call center job. There were incentives for the employer to take me because of my disability and assistance (including financial) for setting me up for it. It was still extremely hard but the disability support checked in on me regularly to help me through it.
Before that, there are plenty of ways to make money online. Too many to list. If you've got the basic skills, the equipment and you're still able to function enough it's worth trying.
There is also going to be a variety of various charity and government support programs for people with disabilities, low income earners, etc. with the specifics depending on where you are. The harsh reality is surviving will mean learning to swallow your pride and enduring shame. Don't just look for "disability" support, take anything you might be applicable for. Make sure to look through every level of government you might come under as they aren't unified and can be difficult to find.
Community groups can be an invaluable resource. If there are ones that might apply to you - whether it be around ethnicity, sexuality, religion, whatever - you can find a wealth of assistance. At the very least they're going to have some free food.