Well, we can't give medical advice but in my experience doctors can be a "wet blanket". I know lots of folks who were told you'll never be able to do this or that again, but if you mend up okay and do your PT you'll likely be able to do most stuff you did before. You still have the knowledge you did before your injury, so I would think teaching is still something you can do.
Obviously you need to take care of yourself but the same tenacity and dedication required to excel in JJ will serve you well in recovery (both kinds).
I would just assume I was gonna be better than ever until proven otherwise! But no matter what, it sounds like you have a reservoir of internal strength/toughness, and you will be okay even if your body is slow to cooperate.