As far as the little one taming down I'd say it's just a matter of time and patience. With consistent, gentle handling he should settle in soon. Most of my snakes usually calmed down after a couple of months. I can understand where an older WC may take a little longer to acclimate to captivity but since you caught him so young he should be just fine.
When it comes to striking and constricting their prey many snakes will just swallow pinkys alive since they don't really put up much of a fight. I'm sure as he moves up in prey size he'll apply his other termination skills. I'd try to get him on f/t prey asap though. Best wishes.