Sounds like a great idea to me, unfortunately I’m not in the targeted group, so my opinion wouldn’t count.
Biggest issue would be lack of clubs and other organizations promoting youth shooting, at least in my opinion.
Kids tend to excell very quickly given the opportunity, proper instruction, and good equipment.
They will lose interest however when their ability can outperform the equipment and competition and theres no place else for them to go.
The model 75 Win mentioned above, and the 513T Rem were entry level target rifles back in their day.
But they were in fact solid performers more capable than many of those using them ever achieved.
The military used 513Ts also for small bore shooting.