As you gain more confidence, try kickturning while moving. Try kickturning while on a ramp (ride up a little ways, kickturn 180, and come back down). The more you practice, the more comfortable you will become.
I've seen many skaters get confident in turning one direction, and never really practicing kickturning in the other. This is OK, but I think it's a bad habit. If you want to be a really confident skater, you need to be comfortable kickturning in whichever direction you need at the time. So, while you go on to learn more skateboarding tricks, remember to spend some time every once in a while practicing your kickturns. Get to the point where you can 180 kickturn in either direction. Even go for 360 kickturns. And, as always, have fun!
If you came to these instructions from the Just Starting Our article, here is a link back to Step 8 - Kickturns.

