Hi Mary -
You are in luck - Just a few months ago we went through a long list of possible RA diets here and this was the results after comparing all of them.
https://www.myrateam.com/users/61ff3982d9e5c851...

There are many out there. Here's a few -
Mediterranean Diet - appears to work for many
AIP Diet: https://autoimmunewellness.com/opt-in/
Wahl's Diet: (An amazing story and great diet plan)
https://terrywahls.com/
Paddison Program - https://paddisonprogram.com/
Dr. McDougall - https://www.drmcdougall.com/recipes/
Arthritis Foundation: https://www.arthritis.org/getmedia/d5d11e00-977...

The important part is to avoid sugar, gluten and dairy. These tend to cause flares for people. Take a break for them and test them individually to see how you may react.

I hope this may help a bit.