For doubleweave, you can consider a single dark/light pair as the smallest number of threads in a pattern/background choice.
The problem is that the snowball and pine tree design is a 5-block design. Summer and winter and doubleweave are both weaves that can produce it, but they don’t require the same number of shafts per block.
You may be surprised by the fibers that are available to you locally, in your own fibershed.
Can you weave 4 layers of cloth at once on an 8-shaft loom? How do you get started?
There’s no replacing the “Aha!” moments to be gained by watching someone who has woven so long that weaving knowledge has sunk into in every synapse, bone, and sinew.