I just started my girls in a kitchen right away when I got them. They'er around 1 year old, and I just got them Feb 28th. I put their food dishes in one and sat it on the floor, they went right in and never had any trouble adjusting to it. Also, the previous owner told me they wouldn't drink from a water bottle. I picked one up the day I got them to try it out, just added a little bit of gatorade to the bottled water and they drank just fine from the bottle, now just water. But, hey, I have 2 little piglet girls, and they have nooo problem when it comes to food, haha. They are so chunky, they were on a diet of cooked chicken, cooked eggs, yogurt, mealies, and fruit & veggies. I switched them to pellets and fruit (all the diet debates were so confusing) until I found photos of how fluffy and healthy the gliders looked on here, and mine weren't, so I switched diet to HPW original w/f&v, a little yogurt on a spoon about every other day and a few pellets scattered as foraging treats, because they love them so and they won't spoil. I go on, I'm sorry.
Your kitchen looks nice, I'm sure they'll find their food just fine when they're hungry.