I got the dual SPD vs platform pedals and hate them. The rationale was if I chose to ride very short errands (in street clothes) OR if I chose to ride in extreme weather with big waterproof boots. Fortunately this pedal is on Rusty, the backup bike; I love the 2-sided MTB SPD pedals on my good road bike. The MTB shoes are very practical for commuting; I love my Keen SPD bike sandals. Also on my commute there are some rough stretches where I have to dismount + walk on some rough terrain.

If you've ridden with toe clips, going to clipless is not a big deal. But yes, before you ride make sure you practice unclipping a few times and do some short neighborhood practice rides. Don't sweat the clipping in part; clip in on one side, push off, and get pedaling. The cleat should home in and lock onto the pedal without need to coast. Look where you're going, not at the pedal. If need be, the first pedals can be with the arch of your unclipped shoe to avoid slipping.