2 offer dilemma

I recruited SA23 and landed a mid-tier BB offer. After that, realized I was graduating a year early and made the decision to join Big 4 following the internship at the BB. Did this because I don’t come from a background of money, so I can’t travel/didn’t want to pass up the $100k that year. If it works out, I do plan on taking that full-time offer from the BB. I’ve heard that there’ll be 2-4 weeks of training for FT (financial edge/training the street) that will overlap with my internship, so I’m looking for advice on how to handle that. Also, assuming I can manage it and considering I’ll be paid during the training, is it possible that I will be caught in any way or violating some rule?