this is very common problem for all over head motion sports, i'm sure more people on here have the same issue than generic physio who may not necessarily have same experience dealing with this.
a. You'll note i said 'preferably a sports physio'. I said this for a reason, which actually isn't that they will likely know more (although they might), it's just that they will more understand your goals of wanting to be very active again ASAP.
b. Yes, shoulder injuries are common in 'overhead motion sports'.
What I find bizarre is that you actually seem to think you're more likely to get good advice from people on here that a physiotherapist.
What I find even more bizarre is that you think someone who has studied physiology for 3-4+ years, and then worked in the industry for a period of time, would somehow potentially not have
infinitely more experience and knowledge in regards to
diagnosis (working out the ACTUAL problem, not having a guess) and then
treatment (prescribing a series of exercises and behaviours, and re-assessing and modifying this regime over the recovery period).
Treatment is pointless if the diagnosis is incorrect. Diagnosis without knowing you, asking the right questions and testing your shoulder with specific movements.... very, very difficult.
I've had rotator cuff issues, and I've done both recovery exercises, preventative exercises and weights....all to fix and prevent this injury. But I can't guess your pain, your problem, or your shoulder, so I'm not about to try. All I can say is be wary of those who claim they can.