You could consider light production work. My most recent job search also had limited person-to-person contact as one of the much-hoped-for parameters to meet. The particular one I turned up has a couple of shoulder-unfriendly frequent movements, so probably wouldn't be the thing for you, but the environment is good. There is a stack of work. I focus on it doing piece after piece, having little else to deal with. That is pretty well all I am responsible for. Is it boring? Most assuredly. Doesn't pay well either. But it meets a number of criteria that I find a better fit for me than, well, about any other job I've had. Despite being really intellectually smart (not bragging, it's simply fact), I don't have much in the way of education, and this has very much affected available choices for jobs -- a huge number of which involve a lot of interaction with people and/or are very physically demanding. I'm not good with the former (basic social ineptitude combined with, when hypo, things being said before going through "the gatekeeper" and when depressed, only being able to manage "faking it" to a certain point). I'm getting too old for the latter.

(On the boring factor... Yes, I do bore very easily. But right now it is ok, as it helps balance the chaos that is my real life. My mind can be elsewhere most of the time, or nowhere. Though the work requires no mental challenge whatsoever, it does call for visual attention --enough to engage the mind in the moment.)

As for cleaning... it could work. I had a solo business doing that for about 5 years. There are varying levels of physicality, depending on the particular job, so there is some latitude for you that way to choose accordingly. It does help to enjoy cleaning(!)

I wonder along with Anika about what kind of experience/training/education you have.