To create a flowy wash, we want our diluted mixture to be about 20% of the strength (color intensity) of the pure color. Compare 1 drop of the pure color, placed on your paper, to a few drops of your mixture.
Use a blank sheet of the photo paper (backside) to test your work. Since this is a test, please share the paper with one or two people around you.
This will also give you a chance to see how the inks interact before you begin your own piece.