Late to the party but just placed an order for a iPhone 14 Pro Max 256GB in Space Black and happily approved for the 24 month 0%

(I was paranoid having read some of the reviews of the Barclays Finance despite having a decent credit file, but has gone straight through no issues whatsoever!)
Delivers 26 Oct - 2 Nov apparently, I don't mind waiting at all but is there a chance that date might be 'brought forward'? Also when does the first payment get taken by Barclays, will it be (roughly) 30 days from my order or 30 days from the actual delivery date of the phone?
For the first time ever I've also decided to chuck AppleCare on top!