YOU Must Set The Tone at Game 1 !!!!
Unfortunately I was yelled at on a weekly basis for standing up and yelling on 3rd down

I even had one lady if front of me scold me for yelling and whistling because it was breaking her concentration for her doing her crossword puzzles.
"I was once yelled at for...clapping too loud. Seriously. " . . . YOTG
You turn the people behind you, and announce to the people in front of you "folks, college football is a participation sport for fans, too. When our boys are driving, make a 1st down, get a 3-and-out, score, or otherwise do something worthy of prompting it - I'm going to: yell, shout, wave my flag/foam finger, stand up, or any combination of the above, and generally act like, well, you know - A BIG TEN FAN. And by the way, when we screw up, a hat may get tossed, and I may spontaneously spew forth with a bad word (or three). If you can't handle that, then I can't help you. I invite you all however, to 'grow a pair' and show some enthusiasm."
I had a verrrrryyyy quiet older couple seated directly behind me for years at the Hump. While they could never be accused of anything more than a golf-clap - they also never complained about my standing/shouting/swearing/jumping/flag-waving. In other words they "got it" even if they didn't participate. I always told them at the 1st game every year that: a. it was great to see them again, and b. apologized in advance for anything that I may spontaneously do or say in support of our Golden Gophers or in being a fan.
You must employ this (or some similar strategy) from minute one, game one, and set that tone firmly and unashamedly at the outset.