I did this today as a learning project. I struggled with color mixing, brush control, and foliage. Some of it's a lack of skill, but much is a lack of patience. I did let areas dry, but I didn't spend a lot if time thinking two steps ahead (which I think you have to do in WC.)
My trees are still weak. I used a round on its side with a rather dry mix - sort of rolling it - but made it muddier the more I tried to tweak it. Lesson: know when to stop!
I need to decide how precise I want my lines and shapes to be - I like the looseness of it, but am I rationalizing laziness? In some cases, I know the answer and will get better (the porch).
The lines on the siding are pencil..
Other thoughts? It's a sketch. It took me about four hours - on 8x10 140# cheap paper with big box store paints that'll have to be replaced quite soon.
My intent long term is to use WC for plein air work vs. acrylics.