Your hands seem to have a lot of different issues. I am very sorry you have a lot of pain to cope with.

As far as Dupuytren’s try not to do surgery first, it made my hands a lot worse. Studies on the subject also agree that surgery should be the last resort. I only had one finger slightly bent the pinky. Alter surgery 3rd 4th and pinky tightened up into a fist . Had therapy and splints but nothing stopped three fingers from curling tight into a fist.

After that I had xiaflex injections which opened all three fingers. It was quite painful for a few days. After initial injections two weeks later went back to the doctors office and he pulled my fingers straight. The xiaflex disolves the nodes which is collagen material. That was over 10 years ago and my hand is still good. It’s helpful to see a doctor who is experienced in xiaflex injections.

Whatever you decide there is no rush . You might ask your doctor if wearing a glove splint nightly would help with finger pain and rest the hand as well as be mindful of weight your hand is holding and motion . Ask about wearing a wrist brace for support and over night. The wrist brace helped and rest for my carpel tunnel. It takes a few months .
I wore a Fixx Glove a brace for Dupuytren’s nightly for a few years after injections. There are some nice spring braces and ring style braces too for daily wear.