Betlegeuse, QoH, & The Doodle Should be fine on day one or two. The Doodle gets smoother with time but it's fine almost right away. I'd take the tops and drip nozzles off the bottles to let them air out overnight then recap it and shake it well. After that just vape any ones that you like.
Raz Cup, CLS, GCD, Radioactive, PBC, and CB are all nice after a night with the caps off, but after you recap them, they will all get better and better with time. I love Radioactive fresh out of the mail but these others really should be put away for around 2 weeks before digging in to fill tanks or cleros. You can drip any of them at any time to check and see if they're ready to fill a tank.
With Nicoticket it can hard to say for certain how long a flavor should steep because nearly all of them are pre-steeped to some degree before you buy them. They aren't mixed 10 minutes before they get boxed, they are mixed well in advance and only when Clark thinks they're good-to-go do they get bottled. That doesn't mean they've peaked, but they are all vape worthy.
Fruit flavors are always ready right out of the gate. Seeing as this is your first order I'd recommend you just vape all of them and anything that you think could be better, stash away. There really is no wrong way to do it. You'll find your own right way for each flavor. Vape on!