high school
in high school, the hits are grown men hits. and the coaching isn't geared towards a noob learning how to hit and take hits
if you are short term, play tackle as early as possible
and in high school there is no 10 play rule. or a b team to stash someone on to develop
the 1's get the reps. 2's get some. 3's in rare situations. below that you are just running gassers and hitting a tackling dummy. there is not enough time at high school practice to learn how to tackle or take hits