I have had many coworkers with osteoarthritis, it is very common. Often asymptomatic, too, and doesn't much impede their ability to work.
The RA, is another matter, especially if it limits your use of your hands, i'd think. I am so sorry to hear of this.
Does your RA limit your use of your hands? Visiting home to home, might not involve as much demand on your hands. (home health, comes in many forms, there is 'shift work' where you stay in one home for 8 to 12 hours,
there is home to home supervisory or nursing care like dressing changes, hanging their TPN, etc,
and there are also office jobs in home health, where you mostly sit at a desk)
SOME shift work, especially in pediatric home cases, might offer cases where you won't need to be lifting that much weight, IF you do have safe and complete control of your hands,
others peds patients, still do require some heavy lifting, or fine motor movements of your hands that might be beyond your ability.
There might be some options in homecare that these might offer less demand on your hands.
The RSD, if severe, could also impact your ability, especially if you have a limb that you can not move as much. Also, some private duty is available here and there, and might have some patients which don't require pulling, lifting, etc. Occasionally, here or there, there is private duty patient, with the bulk of the goal being more about companionship, safety-supervisory role, and not a lot of phyical demands on the caretaker there at all.
I have a pal in California, who does flu clinics all the time. She is sitting, and there's limited use of her hands, just to draw up and give the flu shots. She is assigned to various drugs stores, fire depts, wherever she is sent. She lives in a big city.
Various clinics and some doctor offices, might have less walking, less (if any) weight lifting involved.
If you do have control of your hands, and can still walk easily, and if using your hands a lot, (even if not lifting, jsut moving them) is not beyond you, IV team is a kind of fun, imo. Almost no lifting whatsoever,
but, obviously, you move your hands all day long, and tons of walking.
Outpatient surgery, especially in the discharge areas, is mostly patient teaching and dressing changes, etc, not a lot of lifting or pulling, very fun work, imo. The pre-op areas, tend to involve more running about, but, little if any lifting, unless some immobile patient arrives.....but, come to think of it, they often do have to help put TED hose on, which is hard work.
Recovery room, does involve some lifting, and walking, but, nothing like the hospital nurses face. It's much less lifting or running around, but, there IS some.
Those are just some ideas that came to me, not knowing what exactly YOUR physical limitations are. BEST OF LUCK!!