Ah, by the way, Sakura comes with a fountain pen with a medium nib. Buy a small one and put it in a box.
Color mixing ... first wet an area on the paper with water, then add some color, and it will naturally mix.
This is how you use the palette ... without washing it often. Adjacent colors can be used in the same grid.
=-= What map do you want? . . . . . . . . . .