Dear Soodyogesh

The Wikipedia reference-linkMRI results reports exactly what I pictured in my head. You may want to consult with an orthopeadic surgeon to find out the extent of damage, they will be in a better position to advise whther surgery will be indicated. i would say that because of your age, the prognosis of a surgical intervention would be very good if no complications occur...

However, you can try a conservative management route, where a sports physio or doctor helps you rehab the shoulder to the point it heals...
this is very subjective...if you have a partial thickness tear, this would depend on how the tendon is ton really...if it is torn along its length then the rehab should be good but may take a long time to heal as you keep having to use your arm anyway...a transverse tear, which means across the fibers is very unlikely to respond well to rehab...

partial tears are notorious for very slow rehab...

One thing is for sure...you need to take time off volley ball or any activity that involves extreme overhead movements...
get the opinion of a sports doc or physio first...

In very simple English, one of the muscles that stabilize your shoulder is torn but not fully...

Wish you the best of luck