One can make the switch to clip-less at any age. A casual rider will not benefit so much, but, if you put in more than just a few miles, especially over varied terrain, clip-less pedals can be very beneficial. Until exiting the pedal becomes reflexive, there is a chance of falling. Beginners, enjoying a ride, come to a stop, not thinking about the pedals, try to lift their foot from the pedal, and slowly topple over. I recommend to anyone making the switch, to find a safe place, ride a short distance, stop & place foot on ground, & repeat ... like a thousand times. After awhile, it becomes a reflex to twist the foot out, and you'll never think about it again. Clip-less won't instantly make a big difference in your riding. You'll need to work on technique to reap the benefits of clip-less.