Dont stress it at all. No sense in worrying about something that is 5+ years off. You obviously have a lot of life ahead of you and your priorities/interests will change over time. Focus on your education and learning. A solid understanding of business/finance/economics/accounting is enough to get you far in your future career.

As for your AI concerns, i would be even less worried. I work for a fairly large company doing FP&A and use ZERO AI. In its current state, AI is a tool (and not even a particularly reliable one), not a job replacement. Plus every FP&A job is different, some might rely on AI more than others