Welcome to the forum. This was a fairly simple image to edit. I used the sigmoid module instead of filmic for the tone mapping. I applied shadow and highlights module masked to the sky and the trees in the distance to lift the shadows a bit and to help with the clouds. I am using V4.7 so I used the new color equalizer to bring up the blues to be similar to your original posted JPG.
I didn’t like the bench in the foreground so just for fun I used the retouch module to remove the offending item. I also used the retouch module to get rid of the spot in the sky that may be from a dirty image sensor or a dirty filter on the lens. I had to crop the image as well because your lens hood encroaches on the corners. You might want to consider getting a different hood.
I don’t feel my edit is any better than yours. I hope you enjoy darktable and the forum.
I didn’t come up with a great edit but given this image as a starting point I thought the real star is the sky. The vantage point sort of messes with the composition of the landscape and the river so I did a pretty large crop…
PS noticed other replies since I first loaded this to edit, but before actually posting a reply … mine is a fairly pedestrian attempt by comparison. A fun image to play with, however. Thanks!
Thanks for the play with this photograph.
GIMP. I too removed the bench. Other than that only slight changes. Increased mid-range contrast to emphasise the structure in the field and the reflections in the water.