Firstly, you should ditch the woodchips and replace with 2-3 layers of of paper towel - you don't want your little snake to be accidentally ingesting large solid chunks of indigestible matter when feeding. Get yourself some long (15-25cm) forceps rather than use kitchen tongs - kitchen tongs are much larger than the actual food item and probably a bit scary for a baby snake to have waved over its head. Thirdly, feeding pink mice to a baby carpet is never guaranteed successful. Get hold of some large fuzzies or even small weaner mice, drop into hot tap water for a few minutes until thawed, and then offer from your new forceps, holding it by the tail (the mouse that is!) Young carpets are well able to eat fuzzy or weaner mice, and most prefer these furred offerings over pink mice. And fourthly, offer food in the evening - these guys are largely nocturnal and operate far more comfortably after dark, especially until well established. Once settled, they'll eat pretty much whenever food is offered. Make sure there is nothing distracting in the way of excess movement happening outside the tub - if the snake is nervous it will focus far more on surrounding threats than on the food you're offering. Loosen the lid carefully and slide back just far enough to be able to offer the snake the mouse - if you take the lid right off, you'll be doing something similar to taking the roof off its house, and it may go into panic mode.
Couple this advice with that already offered regarding a hiding place and I'd be surprised if you don't have success within a few days.
Jamie
