Gonna have to stretch out all of those back to full ROM.
It's fine to do after workouts.. and yes there is going to be pain stretching them out so beware that. Add in mobility work like wall slides and band dislocates.
Also, really stretch out the lats, pec major and minor.. get some tennis ball/foam roll, corner stretching, etc. with thise.
I assume you are doing general strength work. Add in some rotator cuff strengthening as well.