Asking for advice/tips for what to do for the home opener

Hello, I'm a french student🇫🇷 and fan of the Bills,

I'll be in buffalo for the home opener against the Lions, sadly I really can't afford to be in the stadium for the game, but I still can't pass the opportunity to experience the game day in the city, but I need advice :

Where should I watch it? Are there fan zones or sports bars I can go to? (19 years old), Is tailgating worth it without a ticket ? What other tips and spots do you have around the city?

Thank you for answering, all help is greatly appreciated and GO BILLS💙❤️🦬