Pre orders opened about 730pm today for target digital sold out almost instantly and the other about 20 minutes later
Edit to add.. walmart opened up about an hour earlier and same thing
But generally speaking, no, you can't get any sort of preference on this kind of thing as an employee. Same chance as everyone else, or risk your job (eg. if you try to have someone in electronics stash one away for you before open or something like that).
better do it in fair way. i have coworkers recently got fired in electronics doing shady business (purchasing gaming systems and already out of stock by the time the store is open-got caught reselling).