6 to 12 months sounds right. I'm 12 months post op on a torn supraspinatus (rotator complex) and labrum. Do the physical therapy and you can start pussy machines in about 3 months. The pain will keep you from going heavy. 6 to 12 months I was able to start freeweight pressing again. I can bench and OHP more than before my surgery and before I got injured, but not as much if I hadn't, haha. Bench is pretty much pain free, but I've adopted a new form. Shoulder still hurts every once in a while but still better every day.
Take your pills after surgery even if you think you don't need them, it helps greatly with the swelling and breakthrough pain. ICE, ICE, ICE. And follow the doctors directions.
Also, I wouldn't plan a cycle unless you are going to lift legs and just let the drugs work on tendon repair. No workouts for at least two weeks after the surgery, Your body will have enough to deal with. Start off by walking and learning to stand without the use of your deltoids, lol.
Good luck and don't worry, you'll get through it. Let me know if you have any more questions.
Check out the atrophy on my right shoulder and arm...