I do not have direct experience with CBD oil.
I did go to a seminar on it. As I understand it, most of the CBD oils are not "standardized." The potency is not guaranteed from batch-to-batch and/or from one brand to another. Therefore, the dose one is told s/he is getting may or may not be accurate. There is a lot of substandard CBD Oil on the market.
That said, some people get some relief. Others do not.
I hope you continue to investigate. I also hope you are led to one of the most potent formulations/brands and I hope it is effective for you!
All methods of treatment, when they are successful, are considered to be giving a placebo effect until they are successful for over 6 months. (The same goes for meds.) Just something to be aware of.
Best wishes for finding relief for your arthritis.

WC