Followed no tutorial but I'm sure someone else has made this in the past. Figured it out in 2023 and have since taught many players. Here's a quick tutorial:

You first toggle custom outlines, go to masks, select the first one and then diagonal stripes pattern. Now read this slowly, the first color will be the lightest your nose will get, if your nose is black then the first color will be dark grey (this is to simulate light shining on it). Second color goes on the straps, you wanna mask it with the color of your fur. Still on the idea that your nose is black, third color will be that BUT it's outline will be the color of your fur, aka only color the "inside" to be the nose color while the outline will form the snout. Finally we have the fourth color, paint ONLY THE OUTLINE BLACK to form your mouth, the rest (including all the other numbers) will form your snout.