You don't say what your computer skills are. If you don't have the computer skills you need to do the work you would need to do from your office, since you are over 50 & disabled, you should qualify for some free, government funded programs to get the computer training you need. We have such programs available in Ohio, where I live. Once you have the skills you need, I agree with the first answer you received. You can advertise your services on Craig's list, as well as look for positions adverised on Craig's list for virtual office ssrvices.
Best of luck to you,