Daily Exercise - Boats, boats, boats

I started this year with kind of a routine exercise.
I paint the same subject every single day (photo reference) (if possible) . The canvas is always 20 x 20 cm.
I always ue the same colors ( Acrylics: ultramarin blue, lemon yellow, cadmium red hue, titanium white).
And I always try to figure out where I struggle most with. Then I try to find soultions for this problems in the next painting.
I learned already al lot.
At the moment, I still struggle with feeling safe in the values plus: clouds.
There are so many more problems for sure, but I want to focus until I learned some more about one of them. Then I can go to the next one.