I started my kids with this when they were 4 years old. today they don't know anything other than Linux (they're 9 and 11 now).
My daughter has Nobara on her laptop and PopOS on her PC. My boy is sold on ZorinOS (I've tried to steer him to something else, but it's an uphill battle).
I have the 8 Pro, and honestly, with another 6 years of updates ahead for it, I see absolutely no reason to take the leap for such a premium. Go with the 8, the "upgrade" isn't worth all that money.