Concerns about starting BJJ
So I have found waht seems to be a pretty legit BJJ school ran by someone who seems to have real credentials:
( http://www.bjjusa.com/about-julio.asp )
My concern/worry is about re-injuring my shoulder. I have a grade 2 AC joint separation that occured about 5 years ago, this accident also tore my rotator cuff and dislocated my shoulder. I have done physical therapy for twice, most recently for the past 3 weeks and my shoulder seems to be tightening up a bit but I want to know from your personal experiences:
How common are shoulder injuries and how often do people continue training after them? I figure there must be a way to learn to protect my weaker side but I really do not know enough about BJJ to be sure.
Also how prevalent is the attitude of "you must feel how bad a submission can hurt you to really understand it" or w/e variation on the "tough guy" approach to training. I see these two questions as somewhat related.
I can't really afford a 2nd injury to the same shoulder and while there is no MA that interests me more to start than bjj, I don't know how realistic i am being.
Thanks in advance