1) I have a full size keyboard that I use wirelessly with my iPhone and works great. Maybe you could try that.

2) During treatment, my son and I used our own form of sign language, thumbs up or down for yes/no, shrug shoulders for I don't know, and I tried to ask yes/no questions or give him 1, 2, 3, choices so he could hold up the right number of fingers. Amazing what you can develop on your own.

3) I think there are speak apps available to convert speak to text.

4) Hospitals sometimes will hand you some of the most common questions / answers on a card that you can point to in order to communicate with others. Or you can make your own to use. If you feel like using a naughty word, you can put that on there, too! They also have a card that has several "happy faces" going from really angry on to very happy so you can tell them how bad the pain is (if you have pain).

BTW - Left hand writing that doesn't come easily is actually beneficial to the brain (keeps it young) which has to make new learning tracks. When I had problem with carpel tunnel in my right wrist I had to do stuff with my left hand which was awkward at first but I find I now still prefer to do one or two of the things with my left hand in preference to my right hand. Being from the "older generation" is not a reason for learning new stuff, and I'm a lot older than you. You may even be surprised at how well you can manage.