My C in Calculus does not bode well for taking on QM at a deeper level. I'm 60 though, will qualify for free classes soon and I'm planning to retire in a couple of years. I've got a good layman's grasp of evolutionary biology, I might go deeper into that. Or take stuff relevant to financial planning so my retirement goes smoother (better late than never).
I'm not anti-Christian. I'm anti-stupid.