Another study for my students form a photography; with reserves of paper to simulate the snow and contrast with the darks.
We worked on paper Moulin Le coq; "Le rouge". It's easy to make whites on this paper by absorbing the pigments. It doesn't support to be badly treated though; paint fast not going back, you can ad layers but don't mess with them while paper is still wet.
Concentrate on the contrasts, start with the darks in the windows, in front of the café and go lighter, painting over the first layers of dark to color them where needed, like on the chairs to make different tones and variety. Mix the darks out of dark primaries.
Mix your colors; check the accuracy before painting to get as close the color and value you want. (You should always have a cheap watercolor paper to test your colors on beside you, I'll never repeat it enough.)
This is much like a coloring exercise like for children to get used to mixing and getting the colors right. Mix real darks and start with them, can feel strange for some.
I agree that the drawing of this one is a bit complicated if you are not a frequent drawer. Just don't get desperate while drawing the chairs!...