Best advise I got when switching to clipless was to practice either in the house on carpeted floor by holding onto say the back of a chair or sofa, maybe a table but you get the idea and just clip in and out both sides until it feels second nature, or outside on the grass where you can hold onto something. If in the house you can do this while watching TV so you don't get bored.
Practice, practice, practice and do practice both sides that way you're comfortable with using either side when you need to.
Ha, I always unclip on my right side when I stop and when I first get on my bike I alway clip in on my left, it just feels right to me but everyone is different.
Hang in there you'll get it and wonder why you didn't go clipless sooner.
Life is like a 10 speed bike, we all have gears we never use.
Charles Schultz
"The bicycle is just as good company as most husbands and, when it gets old and shabby, a woman can dispose of it and get a new one without shocking the entire community." — Ann Strong, Minneapolis Tribune, 1895