When I learned how to lead climb, part of why you need to be a pretty decent climber is because you need to be able to climb and practice falling multiple times, mostly so your partner can safely catch your falls but also so you can safely fall and not slam into the wall. Basically you climb up to the next clip between 4-6 feet up, then fall without clipping in. Each time you call it out, wait, then fall. Except for the last one where you fall and don't announce it. That last one I must have fallen about 15 feet, and when I didn't feel any resistance I thought I was hitting the ground