Breh, if it wasn't for an engineering full scholarship I would have definitely played DII football, and who knows

People just don't understand, let me break down a typical 5 yard run for me:
1) Everybody lines up, you have to see who's in A gap or B, if it's a tackle or a Linebacker, then you gotta see if they are in a 4-3, 3-4, or 5-2. 4-3 best odds are off A gap, 3-4 I look to cut to the weak side after the snap, 5-2 I like to crash the hole and see if I can bounce out. That's all before the play
2) You have to know the blocking assignments. E.g. if my center and right guard are double teaming the NT in a 4-3, I have to crash the A gap hard because as soon as that hole opens the backers are coming in on some Viking raid type steez. If guard is pulling in a 5-2, I probably plan to cut back into the gap he's crashing into after getting the ball because the backers will be out of position most likely
3) once you get the ball and hit the hole, you have to how they are coming at you. A good back needs vision. Straight on if he's bigger you try to spin off it, smaller run him over, if he's fast you hit him with a hesitation move, etc.
^^^If that wasn't complicated enough (and believe me, I've simplified it a great deal) now do it all in less than 1 second