Looking for ideas for remote work

I was an historical archaeologist for almost twenty years until redundancy and a bad back put an end to that career. My strengths are in researching and writing on history, artefacts and sites. I was working for a hospitality company, running their social enterprise but that has been put on hold for the forseeable future. I wrote guest guide books,I developed tours, wrote website content, made presentations for tourists, researched the challenges faced in Cambodia and practical solutions to help break the poverty cycle. I'm currently working freelance on a platform but I can't find enough work or that pays well enough. I live in Cambodia so I don't need a large income, but at the moment I can't earn enough to pay the rent. I'm after advice please?