Be gentle with the PT after surgery.
My surgeon told me to return to all normal activities and it was the wrong thing to do.
I had the wrong PT and it hurst for 5 months.
Until I found this forum I was being told all the wrong things.
These are smart peeps who have been through it all.
Listen to the experiences of them.

Also, research the use of a sling.
The docs had me in one and the PT went crazy as the arm and shoulder needs to be mobile.
The sling creates imbolization, lack of circulation and thats when your shoulder can freeze up like you said.
You will find the swelling will go to your fingers and your elbow will start hurting more so.
"Frozen shoulder" issues are a problem with TOS with the lack of gentle movements.

1. Swimming the breast stroke is the best way to keep your body mobile, the muscles strengthened. No overhand (freestyle) swimming.
2. No lifting over 10 lbs, thats a gallon of milk or water.
I still have a difficult time with that.
3. Keep your clothing in your closet at waist high as not to reach. Paid someone to come reorganized my closet and still abide to it to this day.
4. No lifting of wet laundry from the washer to the dryer.
5. No vacuuming.
6. Nothing repetitive.

You will find that everyday household chores are repetitive, raising your arms, grabbing and dropping.

Just remember gentle glides, and then strengthen with swimming or the Edgelow protocol.

Hope we have helped.
And good luck with surgery.