If you're using new potatoes, you'll probably need less water because the potatoes will contain more water themselves. In any case, add water a bit at a time because it shouldn't be too watery.
Chickpea flour makes this dish healthier and increases the amount of protein. If you don't like it, then you can combine chickpea and all-purpose flour, or use just all-purpose flour. I don't recommend whole-grain flour because it makes the dish mushier.