In those days when I don't have my oil colors (and flats) with me, I've been experimenting with copying a watercolor by Leliepvre, with the intention of painting the Epopees set (
https://epopees-histoire.fr/1027050-mousquetaires-1720.html). Okay, you can see the difference.
Nonetheless, it's an interesting medium; it forces you to work on shadows while already laying down color, so initially, it can feel like working on a patchwork. However, with a bit of practice, once the "puzzle" is completed, some nice pictures can emerge. I've noticed that white is still as important as it is in oil colors, and in fact, you can try adding a bit of white as an additional layer over already dried colors. It can work.