Im am sure that i will not heal by itselfe. I was in a similar situation. MRI of the shoulder are not always very meaningful. I was diagnosed to have a partial tear of the supraspinatus and the subscapularis . After wasting almost a year i went from my orthopedist to a surgeon. He recommended surgery. Surgery was 5 weeks ago. The subscapularis, supraspinatus and infraspinatus were torn. The supscapularis couldn’t be rearached. It was already too much degenerated. But this shouldn’t be that much of a problem. Rehab plan i as follows:
Weeks 1-6: 2 hours / day of continious passiv movement shoulder machine
Weeks 7-8: passiv PT
Weeks 9-12: aktiv PT
After 12 weeks i should be able to slowly and carefully start lifting again.
I would advise you to get the opinion of a shoulder surgeon.