FWIW, I only unclip with the right foot. I guess in an I'm-falling-to-my-left emergency I would try to get the left foot out so I could stop the fall. But unless I'm falling left, I always put my right foot down first.

I think for someone just starting with clipless pedals, it makes sense to focus on getting the most common motions in place first. Work on the other foot later.

Also, I had to have my cleats adjusted when I first went clipless because I started to get knee pains after riding for about an hour. And the right cleat needs to be at a sharper angle than the left -- in my case this is the result of ankle surgery that I had years ago. But it's possible there are slight differences in your feet/ankles/knees etc. that require slightly different positions.

Oh, and good for you!!!! Wahooo!!