Go for the Patriots or the Cowboys. They are great...
Both of those teams are loved & hated in equal measure, although everyone laughs at the Cowboys now.
Kansas City Chiefs good one to follow, founders of the AFC, the Chiefs current offence with Mahomes, Hill, Kelce, Watkins like NFLs equivalent of us attacking, & play in red, also have Andy Reid one of the best coaches in the NFL, everyone who doesn't follow the Niners were pleased that he got to hold the Vince Lombardi trophy
A few reds follow the San Francisco 49ers mostly the exploits in the 80s with Joe Montana, they play in red too
Green Bay Packers the only franchise owned by the fans, although the fans can be rednecks, but won the first 2 super bowls & the super bowl trophy is names after the Packers legendary coach of the 60s Vince Lombardi
Try & watch NFL America's Game a load of episodes are up on YouTube, some of the stories are good that could help