Embryo grading and blastocyst days

TW- euploid embryos

I’m going through my first transfer end of this month and I was wondering if anyone has more info about what’s good, better, worse. I’m feeling anxious because I didn’t get a perfect 4,5 AA and not sure what’s next best. We have day 5 :- 3AB and 4AB Day 6:- 3AA, 3AA, 5AB, 6AA Not sure if the best is 4AB, 3AA or 6AA ?!