The kitchen should only be half as wide as the living room is. Like with the living room, I start digging and turn rock to sand and put it into my Infinite Storage. Just this time, I grind smaller blocks until the hole reaches the size I want. It takes longer, but the sand doesn’t drop onto me.
Read this episode at https://www.crystaldown.de/01-life-in-avan-forest/07-digging-my-cave-the-kitchen/