Have you found a disability lawyer? I've heard there's no upfront cost, they'll help you win your case, if you don't win you don't pay, and if you do win they're just paid a percent of the back pay (a one-time lump sum you get at the beginning based on what you should've gotten in the past, your monthly SS checks are 100% yours). I've heard they get up to 25% of the back pay, you get the other 75% and 100% of your monthly SS checks.

Are you in an area that you could do some sort of delivery work, like door dash or Instacart or UberEATS? The pay can be quite good if you are willing/able to put in at least a couple of hours a day, and it can be relatively low stress, because most of the time you just walk into the place, pick up the food, drive to the person's house, leave the food on the porch, snap a photo in the app to show you indeed delivered it, and that's all the interaction with other people you get most days. I have really been enjoying it quite a bit for that very reason.