My father also has psoriatic arthritis and takes an additional immunosuppressant (embril) with his ocrevus

Arthritis is also an auto immune disease

I'm not sure what is wrong with my hands but they don't work like they used to. Arthritis would be my first guess.

I also have osteoarthritis so you can have both

There's osteoarthritis that isn't the same as rumitoidarthritis. You can have both MS causing problems in your hands as well as having arthritis. Its best to see your doctor to find out