 To watercolor some easy snow branches, start by just sketching in some lines for the branches and then use some blue pigment to watercolor in about half to two-thirds of each of the chunks of snow. Paint the background color in, a duller color in general works well, and then you can start after it's dry painting in the branches themselves. Let them skip around, don't make the branches super solid, and then start adding in the needles, working them in so that some of them are in front of the snow clumps and some of them are behind. The placement of and the density of the pine needles will also help to define all those negative spaces that you created by painting in the background in the first place. Is this something that you might try? I hope so!