I've broken both my shoulders in separate accidents within the last 4 years (proximal humerus). The first one (my right, so my 'good' arm) I had a plate and pins in (known in the trade as an ORIF). TBH I found this quite traumatic and really painful. The second one I didn't say no straight out to the surgery again, but I made it clear I only wanted as a last resort. It was managed with a cast in week 1 which was removed by the fracture clinic and I was given slings instead.
You have my sympathy, they're horrible, horrible injuries. My right was my worse. Anything that required an arm behind my back was impossible, so doing up my bra, or going to the loo (use your imagination!) or anything that needed me to reach up (haircare, getting things from shelves) just increased the pain so much. I really struggled to sleep because I couldn't get into a comfy position. With my right I could only initially eat when my food was cut up or I had soft or finger foods. My husband had to help me with a lot!
Front fastening bras are your friend!
The only things that helped was medication in the short term (though that had its own problems!) time and physio. I love swimming but this was impossible at first as my main stroke is front crawl and this is impossible with a fractured shoulder! However I did find water aerobics really helpful.
It took about 3-4 months for me to return to full fitness.
The first break was in September 2021 and the 2nd in June 2023. I still get mild aches especially when I've hit the swimming pool but it's not bad and not enough to stop me swimming and I believe the benefits of swimming far outweigh the risks of very mild pain.