I have very arthritic hands.
Been taking CBD oil for about 3 years few drops x2 a day. Agree not cheap but it works for me. I can bend them much better with no pain.
I was in UAE then Australia begging of last year where I was unable to take it into either country, my fingers did become much stiffer after about 2 weeks of not having any, very noticeable.
Once home I restarted they quickly reverted back to easier movement.
I was told originally it takes a while to work, but you do need a good quality CBD oil at least 6% strength each small bottle is about £40. The higher the strength the higher the price.
I used a company called Provacan which you can find on line.
Tbh anything with less than 6%Pure CBD won't work.
Good luck if you go for it, nothing venture etc etc