Nice job!
A few quick things…
Watch your values in the background. The darks in the background are just as dark as the foreground, the background darks will be lighter than the dark of the hat. The light values in the background are too light (rocks/sunlit area).
Watch the hues in the skin. Cooler and warmer values. The shadows are likely cooler than you’ve portrayed in the photo of your painting. Glazing with a medium would help you adjust subtle changes.
Check the values in the fish, one is likely higher than the other. Also it’s unlikely every single rock on the boat ramp is the same color. Same goes for the crosswise concrete. Bottom of the coat is a solid color, unlikely because of reflect light being a different color.
Just some quick thoughts.
All the best,
Mark
Painting was easy until I learned how.