First, have a squint, what you can see through the blurriness its whats important, what is needed to get the idea across.
The only perspective I would keep would be the foreground, the rest is flat enough.
Everything in the scene has a limited palette. the forest mid ground trees are dark green and bluey white snow, theres so many of them, adding huge amounts of detail would crowded it and confuse the reader. Do simple trees and then put snow in the right places where it would land on the tree.
The background mountains Would be a line for me with some colouring to hint that there is trees and snow. On the closer mount I would have a less sharp line and more squiggle to indicate that the mountains edge is made of trees, have a few line s within the mountain.
The foreground trees due to where the light is coming from would be in silhouette so not much detail there.
Well thats a cheap way of how I'd do it, kinda hard to picture how this background would fit into your drawing though.