Somewhere. The south of France, near the border with Italy, perhaps even in north west Italy? Likely, from the time stamps. No GPS data in the photograph here.
Working over the photo with the charcoal brush as colored chalk in Procreate. Fussed and fretted in the detail for a while, then just slammed some big broad whites down. Accidentally turned off the background, and whoa…. Finally something to work with.
Still you could select colours from the photo, but treat them as music, not trees. Select already set colour in the drawing and lighten or darken and build the volume.