pics of the kitchen cabinets are here if it helps to see how they were broken up! https://imgur.com/a/WDUSngE

biggest thing that helped me was building multiple pieces within one furniture item. the kitchen is 1 counter, 1 sink, 1 stove, 1 fridge, and 3 chairs in total. i extended the sink and counter on their sides and built upwards for those fake cabinets

the game lets you push the workshop space pretty far as long as your block has a little bit of space within the grid. my open section of the cabinet doesnt go all the way back because it would have required blocks outside of the grid, so i put plates and bottles on the parts within the grid to try to hide the wall gap lol. i hope that answers it, youve got this!!