Got lead certified recently, but I pretty much drop a grade when climbing lead - I’m not as confident and I overgrip.
I’ve done lead falls, I know how to do 'em well, and yet… as someone who’s done top rope for many years, it’s scary not feeling the tension (however small) of a rope pulling your harness up.
Mock leading is another common thing for beginners. Climb toprope with a few extra feet of rope hanging off your harness so you can practice finding a stance and clipping without the fall potential.