"Sounds like a bad hire"...now that was funny!
I coached kids in baseball and football for many years and I always tell guys the #1 rule of coaching kids is to cut the game down to the size and skill level of players.
f you are in a true feeder situation, sure go to the local HS coach and find out what he does but only try to implement things the middle school kids are capable of doing. If the HS is running a passing game you will not get a lot done trying to emulate that style of play. Remember there is a HUGE difference in the talent and understanding level between these age groups AND you will likely be dealing with a number of first time players.
And on that point, FUNdamentals, FUNdamentals, FUNdamentals. As a HS coach, I would be delighted to see young kids that could get into a stance, block and tackle. If they can line up correctly execute fundamentals I could teach them "my system" on the FR and JV teams.
Since head injury is such a key point of emphasis let me offer a great little coaching tip that was passed to me by one of Howard Schnellenberger's assistants...
Bite The Ball. It is a good coaching catch phrase for proper tackling technique. When you make a tackle always try to bite the ball. That will keep your head up, neck bowed and head placement to the side of the torso (yeah, I know if the RB is in a 2 handed carry that's not exactly true).
FWIW, I always ran a lot of Wing T stuff on offense and always kept my QB under center (again this approach introduces and reinforces a lot of fundamentals) rather than some kind of spread game that will be reduced to a QB keep situation more often than not. Our bread and butter was a variety of power off tackle plays but, as another poster noted, misdirection (e.g., cross buck action) was usually quite effective when we ran it. Usually ran just straight up "wedge blocking" on quick hitters and "double the tackle kick out the end" on the power off tackle stuff. Very limited passing game, usually from sprint out action. You can add other stuff based on what your QB is capable of doing.
On defense we usually played a "tight "tackle 6 (i.e., a 6-2-3 alignment with the DTs playing outside shoulder of the OTs. Sometimes we would change the front to a 5-3 Stack as a change of pace. A 3 deep zone is likely good enough to stop/contain any pre-HS passing game. We would move up into a 6-3-2 look on short yardage and be 6-5 or Gap 8 down on the goal line. All very fundamental stuff.
Good Luck.
Peace