Don't worry about it! He'll do fine. Even if he doesn't, he'll be fine.
I'll tell you about 3 of the frosh I watched play at my kid's HS.
#1 - 4 year starter. Great career. Now playing P5 and expected to be a 1st round draft choice in a few months.
#2 - (my kid) spent frosh year mostly on V bench. But did well when he subbed in for mop-in innings, and when used as a defensive replacement in late innings. Became a 3 year starter, had a great career. Now playing D3.
#4 - Had his chances as a freshman but pretty much pooped the bed every time he did. Struggled some soph year too, but became a 2 year starter, had a great career. Accepted a D2 scholly but dropped down to Juco hoping to get to D1.
They all did fine. Yours will too.