I love this brand of transparent watercolors, and here's a link to show you a bit more: https://www.youtube.com/watch?v=QQdr-EesH5Q
I find they are very 'forgiving'. As you will see in the video, they really allow the white of the paper to come through. If I make a mistake, I can easily lift the offending area and start again.
I used this brand, almost entirely, when I painted "Solitude'. Regarding paper, my preference is 300# cold press and 'bright white' if I'm creating a snow scene.