reference photos, I included a dusky sunset from Idaho. I took numerous pics throughout our travels, and many had to do with sky and mountains. Sometimes there were structures (barns, silos, homes) and sometimes not.
Here's a trial at a landscape, w/o looking a any reference photos. You can see that I imagined a house at the top of the middle ridge and then painted it out. The pencil lines are emphasized in the photo, and not as noticeable otherwise. The bottom photo gives an idea of what I was riffing from.
I really miss big sky. The sky in Ohio can be beautiful, but the sky out west is, well majestic.