For a minimal "stoned" feeling I would recommend trying a high ratio CBD tincture. A 20:1 or a 15:1 tincture would help your arthritis while causing a minimal (if any at all) psychoactive effect. Tinctures are a great way to introduce yourself in to medical cannabis as they are easy to dose correctly and are generally very mild in comparison to other cannabis products.
I would also not discount topicals. Cannabis topicals are a fantastic way to medicate as they will never cause any high effect and are very portable. I personally carry a few topical in my car and always one on my person.