I'd say you've done extraordinarily well in replicating the watercolor look! If not for the edges of the paper, which look like they've been hit rather heavily with the burn tool, I would have thought it was a physical painting. Well done! When looking at the full size, there are a couple more things that break the effect a little: the difference in sharpness between the mountains/hills and labels, and the tear in the edges which doesn't look very natural. I also think the full size is unnecessarily big, making everything look a little blurry.

Oh, and welcome to the forums