Using my own half moon as a guide, I painted everything except the half moon at the base of my nail. It took several careful applications to shape a smooth half moon. If you mess up, dip a cotton tip in acetone and carefully remove the mistake. It may take several tries till you develop a technique that works for you. Just be patient--you CAN do this! ;) Repeat the same thing on every nail.
At this point you could seal it up with top coat or you could get a bit more creative. You could choose another polish to paint in the now-empty half moon space. or you could paint a thin line of a contrasting color along the edge of the half moon. Just a couple ideas, but feel free to come up with your own.
Give it a try and send photos of your results to me. If you do, I'll feature them on my blog!