As for GPA… It seems that you you can throw a rock in any direction and bounce off 15 high school valedictorians. So, if you go to Vanderbilt, I assume ‘good’ is 4.0! 
From my point of view, hundreds of miles away, you just have to put in the work and you’ll be fine. My son commented a few times about how insane it was for those who party all the time… not enough hours in the day for too much of that. I think many 4.0’s are distant memories for that crowd. You HAVE to compose, whether you feel motivated or not… things like that. Great lessons from a dad’s point of view… pretty sucky from the student’s perspective… But no worries, you’ll be fine.