Student or Learner
When I say: "I'm not much for politics", will it mean: "I'm not big on politics"?
I'm not particularly interested in politics
That's not what I meant at all, but thanks anyway
No. But going on the tag for your thread, "expression 'to be much for something'",
a reasonable guess would be that you meant:
'to be too much for', which dawoodusmani defined for you.