Hey :D I checked out your skin and it looks nice. I like the way you interpret his image into a skin. I suggest looking up references for the jeans. Like searching for "Ripped Jeans Minecraft Skins" then download some of the skins then observe how they're made via the skin editing apps. And I suggest looking up tutorials in making color palettes :D
I learned how to make this kind of jeans by comparing various skins with ripped jeans and by just messing it up tbh haha. Hoping to see your skinning skills improve ^^