Coasting is the same as the Prius. If you let off you get a small amount of regen. So you have to reapply the go pedal a little to get a coast. The nice thing about the Leaf is it has a power/regen display kind of like a 3rd gen Prius. So, you have some visual feedback to help you coast.
The Leaf dash is shown below. The indicator is the top display with the bubbles. The bubbles fill up as you accelerate or brake. As shown would be the coasting position. If you let off the go pedal completely the regen bubble to the left fills up with a dot.
Keeping it in that area is IMO very easy, but I'm used to driving a Prius which acts the same way.