Can't Find Furniture.png

I'm completely new to modding and I want to edit the appearance of my furniture. I've followed the steps outlined in this thread to extract all the files from Stardew Valley/Content/ and a Furniture.ymal file showed up in my extractions folder but there was no Furniture.png, which I'm assuming I need in order to edit the furniture.

I feel as though I'm missing something extremely obvious here, but I haven't been able to find any thread addressing this and I would really appreciate any help! Thank you!

(I accidentally posted this in the wrong forum earlier, so sorry for any doubles.)