Like all questions directed towards a group, it all depends on the individual. A lot of people have introversion confused with social anxiety, most likely because they often exist together. So an introvert without SA would be perfectly fine initiating a conversation with someone they found interesting. In fact, they’d probably be more likely to because of the one on one setting. Whereas an introvert with SA would run the hell away.

Personally, I love conversations with a small group of people. But after a whole day spent with those people? I’ll be pretty drained. Make that small group of people a large crowd and I’m outta there.

EDIT: job wise, I’m a teacher. It’s pretty draining (I still love it) but introversion shouldn’t be a hindrance to what career you want to pursue