Shutdown/burnout is very common for autism.

To commiserate: my entire energy reserve is taken up just by going to and from work and extra chores leave pits in my stomach from stress, so I also do a lot of nothing outside of my bare survival responsibilities.

Decompressing by lowering your sensory input isn’t a bad thing, but if it’ll help you feel better to do something else maybe find a low-stimulus sedentary “activity” like a craft or drawing or listening to music or whatever strikes your fancy. Do the barest minimum, then consciously give yourself time to “unsqueeze” your brain and body without guilt. Recovery is not a sin.