I booked yesterday using Expedia $1,151.10 CAI - BKK in First return. (found using google flights)

It's the first I use Expedia but I am a bit worried I got 2 e-mails.
Last one "Expedia travel confirmation"

The ticket also mentions "Class: First (A)".

I have not been charged yet, is that normal (24 hours have passed since I booked)? I usually get charged immediately on all other booking sites.