I will add that, at least to me, it truly does seem like a no brainer given that Oberlin is essentially a free ride for OP.
Do your best at any place, and good things will often happen. Life is what you make it.
And it really helps not to be saddled with debt at such a young age. Oberlin is an excellent school for sure.
Kudos to the OP. And it’s not a debacle: you are very fortunate!