A very poetic, warm, and harmonious work that perfectly conveys the silence and peace of an autumn forest.The softness of the sky and clouds is an important part of the tranquil atmosphere. Adding texture to the sky, especially making it blue, will disrupt the smoothness of the image. Texture is needed on the "ground," i.e., on solid objects, but not in the sky. Furthermore, the current tonality of the sky organically connects the foreground with the background and doesn't draw attention away from the main theme—the golden birch grove.
The sky in the background appears slightly faded. You could try bringing out the texture of the clouds a bit or enhancing the blue in the editor to emphasize the contrast with the yellow foliage (blue and yellow are complementary colors that enhance each other).
it's a shame the cyclist is positioned almost vertically under the lighthouse.