I have really bad shoulders.
having said that, I do have a ART/Chiro working on them. It's a long process though, due to the gravity. At one point, it was so bad, I could not even squat due to pressure. I can now OHP, but I still have to be careful. Too much volume will stop me for 7-10 days.
As stated above, you need to get them better.
Now, you need to work around the injury. I started with a lot of band work. Finding out what angle I could use. One or two arms, doesn't matter. Just start and get some blood in there.
My exercise of choice (that means no pain) are ring press (different leg angles) and scrape presses (I found an angle that has no pain).
Worrying about your upper chest not growing is pretty much the last thing on your mind.
Just get healthy and find what you can do with no pain.