Frankly, my dear, I don't ... know. Considering that nobody else does either, I REALLY don't know. There's a lot of tender stuff developing in there. And it's a lot more than ears. After the little varmint arrives, I'd still keep the concussive exposures down for a few years. Subsonic rimfires? At age 2, my father took me out back to shoot his little .32 acp. That was a bit sharp for my expectations. I did an unhappy dance and pee'd my pants. That immunized me from wanting to shoot that thing for a number of years.
From there it was cork-on-a-string guns, shooting at a wind-up metal bear before it could walk off a kitchen chair. There was no pointing of cap-guns or water-pistols ... ever. Once that was learned, the Daisy Red Ryder followed; then a Sheridan pellet gun, and finally a Browning .22 (with Dad's help on the last $10 !) Then it was Mom's old 20ga and a M94 in 32-40. And a 722 in .222 Rem. And blackpowder. (And yes, I've been "burned.") It didn't stunt my growth, nor did it diminish my fascination with hunting stories and firearms.
I'm an Old Man now, and I have so many ways to throw a bullet that it's embarrassing. 2 big safes, plus a safe-room with a vault door. I could use a few more, but a fellow's got to make-do.
If it was me, I'd consider it a great excuse for getting a couple of very good suppressors, even if only for a few years. Lot's of stories, books, and campfires from now, I hope you have a good, safe partner on the trail.