You are responsible for the health and wellbeing of your body. You are the one who should be most concerned about it.
The YMCA might not be the most cutting-edge gym, but it has a genuine sense of community - and a commitment to it, as well.
You have to be able to properly assess a problem in order to create and attack a solution. And that includes if the problem is you.
Are you working out because it's beneficial and enjoyable? Or are you doing it because you're trying to fix something from the past?
There are no rights without attendant responsibilities. As a student of BJJ you have responsibilities to yourself, your instructor, and your community. I'm going to outline them. Tell me if you agree.
What do a PhD and Brazilian Jiu-Jitsu have in common? More than you think. Think about your training as an academic discipline - and think about what you're willing to do to excel.