Two offers

Hello everyone, Im not too sure how to navigate this.

I accepted an offer early on out of school.
It hasn't started yet but soon after, I received another offer for $5k more per year and with an organization that qualifies for PSLF.

I want to pursue the second offer as the organization aligns more with my values, that little bit of $ makes a difference for me, and the opportunity for PSLF is really important.

If you were in this position, how would you navigate this? Do I just tell the first offer I can no longer move forward? I'm also very scared to do that lol

My DMs are also open if anyone has advice they want to give directly!