Your recovery time is gonna depend on what they find when they get in there. Let's say it's just a spur, you're looking at something like 4-8 weeks out of the gym as long as pain subsides quickly.
Let's say there's a minor cuff tear from the spur, you're looking at 6-10 weeks out of the gym and then a few months of light training to work your way back up.
If it's a complete massive tear, you're looking at a 16 week PT and unfortunately AT LEAST 6 months out of the gym, more likely 8-10 months even for a healthy young man.
Supplement your body with tons of sleep and ice as often as you think about hot women I'm talking 6-8 times per day.
Once the incision closes, use ice in a pillow case rather than those fruity gel packs. The old school method is 2-3 times more potent and 2-3 faster at getting swelling out. Plus you only have to leave aggressive icing for 8-10 minutes at a time to achieve full effect.