A effective method to Clip in and out regardless of your level as a cyclist. Keep in mind that these are techniques that have worked for me and you may obtain different results entirely.
As with any cycling activity, follow all recommended safety rules and only do so in an environment that you feel comfortable and safe.

Have your pedal release set to the easiest setting while learning.
Decide what leg you will use to clip in and out and do so consistently.
You aren't clipping out both legs, just one leg.

There are a number of pedal and cleat systems, Do your research to find the one that works for you.