Yakone, 1st-off welcome to the vaping-club. I've been analog-free for 6+ months now, and still super excited. (1PAD for 27 years).
As far as steeping goes, it depends on the juice, and your own particular set of taste and taste-buds. You can expect that your tastebuds may change significantly now that you have slowed your cigarette consumption down.
Bottom line is, if you like the juice right out of the bottle, then vape on! My experience has been that fruity and minty (and fruity + minty) juices seem not to need any steep time. Some of the more complex, tabacco-derived flavors CAN change significantly (sometimes for the better) if they are allowed to sit exposed to air for a time in a cool cupboard. Right now I'm vaping Boba's Bounty (a juice that definitely improves with steeping IMHO) in a DCT carto tank on an ITaste MVP, and switching to PG Hype in a Unitank on top of my provari.
Be careful about reading this forum until all hours and chain vaping, it has caused me to order serious loads of equipment. I've probably spent as much as I've saved (easily) but I don't cough every morning, I have more stamina, and I don't stink like a stale .....
Good luck to you! Remember, whatever you're doing that keeps you off of analog cigs is the right thing, no matter what.